| Reference number | Title | Date |
| NLB/12/830 | Copy letter from Robert William Frederick Harrison, to Sir William Henry Flower, Fellow of the Royal Society | 14 May 1896 |
| NLB/6/583 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 4 June 1892 |
| IM/Maull/001476 | Flower, William Henry | 1892 |
| MS/427/26 | Copy letter from [Thomas Henry] Huxley, Secretary of the Royal Society; to Prof. H. Smith, a copy also sent to Prof. [William Henry] Flower and Prof. [William] Odling | 19 January 1880 |
| NLB/14/325 | Copy letter from Robert William Frederick Harrison, to George H Burch, Sir John Soane's Museum, 13 Lincoln's Inn Fields, W.C. | 17 February 1897 |
| NLB/2/214 | Copy letter from Herbert Rix, to William Henry Flower, Fellow of the Royal Society | 29 February 1888 |
| NLB/2/226 | Copy letter from Herbert Rix, to William Henry Flower, Fellow of the Royal Society | 5 March 1888 |
| NLB/1/330 | Copy letter from Michael Foster, to Professor William Henry Flower, Fellow of the Royal Society | 23 December 1886 |
| NLB/2/408 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 4 June 1888 |
| NLB/2/415 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 11 June 1888 |
| NLB/4/161 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 27 February 1890 |
| NLB/2/985 | Copy letter from Herbert Rix, to Professor Michael Foster, [Royal Society] | 21 January 1889 |
| NLB/4/607 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 21 July 1890 |
| NLB/6/104 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 2 March 1892 |
| NLB/6/356 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society, Natural History Museum, South Kensington | 25 April 1892 |
| NLB/6/901 | Copy letter from Theodore E James, to Messrs Harrison & Sons | 18 August 1892 |
| NLB/7/846 | Copy letter from Herbert Rix, to Sir William Henry Flower, Fellow of the Royal Society | 8 May 1893 |
| NLB/3/1008 | Copy letter from Herbert Rix, to Professor Michael Foster, [Royal Society] | 9 December 1889 |
| NLB/5/30 | Copy letter from Michael Foster, to Professor William Henry Flower, Fellow of the Royal Society, Natural History Museum, Cromwell Road, S.W. | 23 February 1891 |
| NLB/5/94 | Copy letter from Michael Foster, to Professor William Henry Flower, [Fellow of the Royal Society] | 13 March 1891 |
| NLB/6/1174 | Copy letter from Michael Foser, to Sir William Henry Flower, Natural History Musuem, S.W. | 5 November 1892 |
| NLB/7/56 | Copy letter from Herbert Rix, to Sir William Flower, Fellow of the Royal Society, British Museum (Natural History) | 18 November 1892 |
| NLB/7/266 | Copy letter from Herbert Rix, to Sir William Henry Flower, Fellow of the Royal Society | 9 January 1893 |
| NLB/7/471 | Copy letter from Michael Foster, to Sir William Henry Flower, British Museum (Natural History) | 23 February 1893 |
| NLB/7/441 | Copy letter from Michael Foster, to Professor Harry Govier Seeley, Fellow of the Royal Society | 17 February 1893 |
| NLB/8/11 | Copy letter from Herbert Rix, to Sir William Henry Flower, Fellow of the Royal Society | 29 June 1893 |
| NLB/8/157 | Copy letter from Herbert Rix, to Dr Philip Lutley Sclater, Fellow of the Royal Society | 22 July 1893 |
| NLB/8/287 | Copy letter from Herbert Rix, to Sir William Flower, Fellow of the Royal Society and Treasurer, Owen Memorial | 21 September 1893 |
| NLB/8/1004 | Copy letter from Herbert Rix, to Sir William Henry Flower, Fellow of the Royal Society | 9 February 1894 |
| NLB/11/12 | Copy letter from Herbert Rix, to Sir William Henry Flower, Fellow of the Royal Society | 3 April 1895 |
| NLB/11/276 | Copy letter from Michael Foster, to the Secretary, Science and Art Department, South Kensington, S.W. | 24 May 1895 |
| NLB/11/323 | Copy letter from Herbert Rix, to Sir William Henry Flower, Fellow of the Royal Society, British Museum, Cromwell Road, S.W. | 1 June 1895 |
| NLB/17/429 | Copy letter from Robert William Frederick Harrison, to Sir William Henry Flower, Fellow of the Royal Society, 26 Stanhope Gardens, Queen's Gate, S.W. | 29 October 1898 |
| NLB/13/310 | Copy letter from Robert William Frederick Harrison, to Sir Joseph Fayrer, Fellow of the Royal Society | 23 July 1896 |
| NLB/12/457 | Copy letter from Herbert Rix, to Professor Alfred Newton, Fellow of the Royal Society, Magdalene College, Cambridge | 21 February 1896 |
| NLB/14/323 | Copy letter from Michael Foster, to Professor Arthur Harry Church, Fellow of the Royal Society, Shelsey, Kew | 18 February 1897 |
| NLB/14/14 | Copy letter from Michael Foster, to Sir William Henry Flower, Fellow of the Royal Society | 11 December 1896 |
| NLB/12/115 | Copy letter from Michael Foster, to Dr George Murray, Natural History Museum | 9 December 1895 |
| NLB/14/282 | Copy letter from Michael Foster, to the Trustees of Sir John Soane's Musuem | 9 February 1897 |
| NLB/14/764 | Copy letter from Robert William Frederick Harrison, to Professor Michael Foster, Secretary, Royal Society | 11 May 1897 |
| NLB/14/317 | Copy letter from Robert William Frederick Harrison, to Professor Michael Foster, Secretary, Royal Society | 15 February 1897 |
| NLB/14/772 | Copy letter from Robert Willliam Frederick Harrison, to Sir William Henry Flower, Fellow of the Royal Society | 13 May 1897 |
| NLB/15/629 | Copy letter from Arthur William Rucker, to Sir William Henry Flower, Fellow of the Royal Society | 8 November 1897 |
| NLB/16/656 | Copy letter from Robert William Frederick Harrison, to Sir W H Flower, Fellow of the Royal Society, British Museum (Natural History), Cromwell Road, S.W. | 17 May 1898 |
| NLB/15/815 | Copy letter from Michael Foster, to David Sharp, Fellow of the Royal Society, Hawthorndene, Hills Road, Cambridge, care of W A Nedham, Commissioner, Nagpur | 17 December 1897 |
| NLB/15/856 | Copy letter from Robert William Frederick Harrison, to Sir William Henry Flower, Fellow of the Royal Society | 23 December 1897 |
| NLB/19/162 | Copy letter from Theodore E James, to Messrs Harrison & Sons | 3 July 1899 |
| NLB/20/636 | Copy letter from Robert William Frederick Harrison, to Charles Edward Fagan, British Museum (Natural History) | 6 June 1900 |
| NLB/19/599 | Copy letter from Robert William Frederick Harrison, to Dr Henry Woodward, Fellow of the Royal Society | 7 November 1899 |
| NLB/19/613 | Copy letter from Robert William Frederick Harrison, to Dr Henry Woodward, Fellow of the Royal Society | 9 November 1899 |
| NLB/20/36 | Copy letter from Robert William Frederick Harrison, to Messrs Fry & Son | 19 January 1900 |
| NLB/20/76 | Copy letter from Robert William Frederick Harrison, to Messrs Fry & Son | 26 January 1900 |
| NLB/19/866 | Copy letter from Robert William Frederick Harrison, to Dr Henry Woodward, Fellow of the Royal Society | 10 January 1900 |
| NLB/20/46 | Copy letter from Robert William Frederick Harrison, to Messrs C E Fry and Son | 22 January 1900 |
| NLB/20/44 | Copy letter from Robert William Frederick Harrison, to Dr Henry Woodward, [Fellow of the Royal Society] | 22 January 1900 |
| NLB/20/216 | Copy letter from Robert William Frederick Harrison, to Messrs Morgan & Kidd | 27 February 1900 |
| NLB/20/229 | Copy letter from Robert William Frederick Harrison, to Professor William Carmichael McIntosh, Fellow of the Royal Society, 2 Abbotsford Crescent, St Andrews, N.B. | 27 February 1900 |
| NLB/20/240 | Copy letter from Robert William Frederick Harrison, to Professor William Carmichael McIntosh, Fellow of the Royal Society | 5 March 1900 |
| RR/4/95 | Letter from John Marshall, on a paper 'On the posterior lobes of the cerebrum of the quadrumana' by William Henry Flower | 3 March 1862 |
| RR/9/2 | Referee's report by William Henry Flower, on a paper 'On the structure and development of lepidosteus' by Francis Maitland Balfour and W N Parker | 7 January 1882 |
| MC/11/310 | Letter from W H [William Henry] Flower, Royal College of Surgeons of England, Lincoln's Inn Fields, to [John] Evans, [Treasurer of the Royal Society] | 21 February 1879 |
| RR/4/97 | Letter from Thomas Henry Huxley, on a paper 'On the posterior lobes of the cerebrum of the quadrumana' by William Henry Flower | 4 March 1862 |
| RR/7/130 | Referee's report by William Henry Flower, on a paper 'On the structure and development of the skull of the common frog' by William Kitchen Parker | 31 January 1871 |
| NLB/2/873 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 29 November 1888 |
| RR/6/126 | Referee's report by John Tomes, on a paper 'On the development and succession of the teeth in the marsupialia' by William Henry Flower | 19 June 1867 |
| RR/5/172 | Referee's report by William Henry Flower, on a paper 'On the structure and development of the skull in the ostrich tribe' by William Kitchen Parker | 25 October 1865 |
| PT/71/4/14 | Plate, 'Echidna' by W H [William Henry] Flower | [1865] |
| PT/71/4/10 | Plate, 'Hedgehog' by W H [William Henry] Flower | [1865] |
| RR/6/125 | Referee's report by George Granville Francis Egerton, 2nd Earl of Ellesmere, on a paper 'On the development and succession of the teeth in the marsupialia' by William Henry Flower | 27 May 1867 |
| RR/7/45 | Referee's report by William Henry Flower, on a paper 'On the fossil mammals of Australia - Part III. Diprotodon australis' by Richard Owen | 5 March 1870 |
| RR/6/206 | Referee's report by William Henry Flower, on a paper 'Description of the cavern of Bruniquel, and its organic contents.—Part II. Equine remains' by Richard Owen | 14 April 1869 |
| RR/6/183 | Referee's report by William Henry Flower, on a paper 'On the appendicular skeleton of the primates' by St. George Jackson Mivart | 8 March 1867 |
| RR/7/495 | Referee's report by William Henry Flower, on a paper 'On the placentation of the lemurs' by William Turner | 21 April 1876 |
| RR/7/262 | Referee's report by William Henry Flower, on a paper 'On the structure and development of the skull in the pig (sus scrofa)' by William Kitchen Parker | 14 July 1873 |
| RR/9/174 | Referee's report by William Henry Flower, on a paper 'Pelvic characters of thylacoleo carnifex' by Richard Owen | 2 July 1883 |
| MC/15/139 | Letter from [William Henry] Flower, British Museum (Natural History), to [Michael] Foster | 3 February 1891 |
| RR/9/79 | Referee's report by William Henry Flower, on a paper 'Description of portions of a tusk of a proboscidian mammal' by Richard Owen | 11 May 1882 |
| RR/7/251 | Referee's report by William Henry Flower, on a paper 'On the osteology of the hyopotamidae' by W Kowalevsky | 29 April 1873 |
| RR/8/146 | Referee's report by William Henry Flower, on a paper 'On the placentation of the Apes, with a comparison of the structure of their placenta with that of the human female' by William Turner | 13 May 1878 |
| RR/9/172 | Referee's report by William Henry Flower, on a paper 'On the affinities of thylacoleo' by Richard Owen | 20 March 1883 |
| RR/8/334 | Referee's report by William Henry Flower, on a paper 'On the structure and development of the skull in sturgeons (Acipenser ruthenus and A. sturio)' by William Kitchen Parker | 22 July 1881 |
| RR/9/383 | Referee's report by William Henry Flower, on an unnamed paper about 'thylacoleo carnifex' by Richard Owen | 29 November 1886 |
| RR/9/381 | Referee's report by William Henry Flower, on a paper 'Description of fossil remains of two species of a genus (Meiolania) from "Lord Howe's Island."' by Richard Owen | 31 March 1886 |
| RR/9/299 | Referee's report by William Henry Flower, on a paper 'On the structure and development of the skull in the mammalia.— Part II. Edentata' by William Kitchen Parker | 20 March 1885 |
| RR/9/352 | Referee's report by William Henry Flower, on a paper 'Remarks on the cloaca and on the copulatory organs of the amniota' by Hans Friedrich Gadow | 1 May 1886 |
| RR/10/203 | Referee's report by William Henry Flower and Edwin Ray Lankester, on a paper 'On the skull of a marsupial carnivore Thylacopardus australis' by Richard Owen | 4 December 1888 |
| RR/5/78 | Referee's report by William Sharpey, on a paper 'On the commissures of the cerebral hemispheres of the marsupialia and monotremata as compared with those of the placental mammals' by William Henry Flower | [1865] |
| RR/4/98 | Referee's report by John Marshall, on a paper 'On the posterior lobes of the cerebrum of the quadrumana' by William Henry Flower | 8 October 1862 |
| RR/9/81 | Referee's report by William Henry Flower, on a paper 'On the development of the skull in lepidosteus osseus' by William Kitchen Parker | 18 February 1882 |
| MS/427/145 | Copy letter from Walter White, Assistant Secretary of the Royal Society, to T. L. Donaldson Esq. | 2 December 1881 |
| MS/427/223 | Note of a letter from [George Gabriel] Stokes, Secretary of the Royal Society; to Leiut Gen. Sir [Henry] Ponsonby K.C.B | 3 November 1882 |
| MC/10/205 | Letter from W H [William Henry] Flower, Royal College of Surgeons of England, Lincoln's Inn Fields, to [Thomas Henry] Huxley, [Secretary of the Royal Society] | 25 January 1875 |
| NLB/5/534 | Copy letter from Michael Foster, to Professor William Henry Flower, Kent | 7 July 1891 |
| NLB/2/412 | Copy letter from Herbert Rix, to John Whitaker Hulke, Fellow of the Royal Society | 8 June 1888 |
| NLB/2/414 | Copy letter from Herbert Rix, to S E Spring-Rice, Treasury, Whitehall | 11 June 1888 |
| NLB/2/405 | Copy letter from Herbert Rix, to Professor Michael Foster [Royal Society] | 1 June 1888 |
| NLB/3/1011 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 11 December 1889 |
| NLB/3/1012 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 11 December 1889 |
| NLB/11/430 | Copy letter from an unknown correspondent, to Sir Joseph Dalton Hooker, Professor Edwin Ray Lankester, Osbert Salvin, and Sir William Henry Flower, Fellows of the Royal Society | 26 June 1895 |
| NLB/11/417 | Copy letter from Michael Foster, to Sir William Henry Flower, Fellow of the Royal Society | 25 June 1895 |
| NLB/9/877 | Copy letter from Herbert Rix, to W Graham Greene, Admiralty, Whitstable | 24 July 1894 |
| NLB/17/66 | Copy letter from Robert William Frederick Harrison, to Michael Foster, Secretary, Royal Society | 11 July 1898 |
| RR/5/280 | Referee's report by William Henry Flower, on a paper 'On some varieties in human myology' by John Wood | 13 November 1864 |
| RR/7/193 | Referee's report by William Henry Flower, on a paper 'On the structure and development of the skull in the salmon' by William Kitchen Parker | 2 December 1872 |
| RR/8/243 | Referee's report by William Henry Flower, on a paper 'On the ova of the Echidna hystrix' by Richard Owen | 10 August 1880 |
| RR/8/239 | Referee's report by William Henry Flower, on a paper 'Description of some remains of the gigantic land-lizard (Megalania prisca, Owen), from Australia.—Part II' by Richard Owen | 24 June 1880 |
| RR/10/85 | Referee's report by William Henry Flower, on the Croonian Lecture 'Researches on the structure, organization, and classification of the fossil Reptilia.—II. On Pareiasaurus bombidens (Owen), and the significance of its affinities to Amphibians, Reptiles, and Mammals' by Harry Govier Seeley | 10 June 1887 |
| EC/1864/07 | Flower, Sir William Henry: certificate of election to the Royal Society | |
| NLB/11/262 | Copy letter from Michael Foster, to; William Turner Thiselton-Dyer, Sir William Flower, Mr Salvin, and Sir Jospeh Dalton Hooker | 21 May 1895 |
| RR/6/94 | Referee's report by William Henry Flower, on a paper 'On the dentition of Rhinoceros leptorhinus (Owen)' by William Boyd Dawkins | 1 October 1866 |
| RR/10/204 | Third referee's report by William Henry Flower, on a paper 'On the skull of a marsupial carnivore Thylacopardus australis' by Richard Owen | 6 December 1888 |
| RR/7/393 | Referee's report by William Henry Flower, on a paper 'On the structure and development of the skull in the batrachia. Part II' by William Kitchen Parker | 30 November 1875 |
| PT/64/7/1 | Manuscript, 'On the posterior lobes of the cerebrum of the quadrumana' by William Henry Flower | [1861] |
| PT/64/7/2 | Plate, inner face of right cerebral hemisphere of various primate brains by W H F [William Henry Flower] | [1861] |
| RR/7/243 | Referee's report by George Busk, on a paper 'On a newly discovered extinct ungulate mammal from Patagonia, homalodonto-therium cunninghami' by William Henry Flower | 22 May 1873 |
| RR/7/423 | Referee's report by William Henry Flower, on two papers 'On the development of the teeth of the newt, frog, slowworm, and green lizard' and 'On the structure and development of the teeth of ophidia' by Charles Sissmore Tomes | 23 January 1875 |
| PT/71/4/2 | Plate, 'Human brain' by W H F [William Henry Flower] | [1865] |
| PT/71/4/7 | Plate, 'Sheep' by W H [William Henry] Flower | 1865 |
| RR/5/77 | Referee's report by John Marshall, on a paper 'On the commissures of the cerebral hemispheres of the marsupialia and monotremata as compared with those of the placental mammals' by William Henry Flower | 18 May 1865 |
| PT/71/4/5 | Plate, 'Brain of Bennetti [Bennettii] kangaroo (Macropus bennettii) dissected from above' by W H [William Henry] Flower | February 1865 |
| PT/71/4/3 | Plate, 'Human brain - transverse section' by W H [William Henry] Flower | 1865 |
| PT/71/4 | Paper, 'On the commissures of cerebral hemispheres of the Marsupialia and Monotremata as compared with those of the placental mammals' by William Henry Flower | [1865] |
| PT/71/4/11 | Plate, 'Kangaroo (Macropus major)' by W H [William Henry] Flower | [1865] |
| PT/71/4/4 | Plate, development of the human brain by W H [William Henry] Flower after F Schmidt | 1865 |
| PT/71/4/9 | Plate, 'Sloth (Cholcepus didactylus)' by W H [William Henry] Flower | [1865] |
| PT/71/4/8 | Plate, 'Rabbit' by W H [William Henry] Flower | 1865 |
| PT/71/4/6 | Plate, 'Goose' by W H [William Henry] Flower | [1865] |
| PT/71/4/13 | Plate, 'Thylacine' by W H [William Henry] Flower | [1865] |
| PT/71/4/12 | Plate, 'Wombat' by W H [William Henry] Flower | [1865] |
| PT/71/4/1 | Manuscript, 'On the commissures of cerebral hemispheres of the Marsupialia and Monotremata as compared with those of the placental mammals' by William Henry Flower | [1865] |
| PT/64/7/3 | Plate, portions of cerebra of various primates by W H F [William Henry Flower] | [1861] |
| RR/10/257 | Referee's report by William Henry Flower, on a paper 'The spinal curvature in an aboriginal Australian' by Daniel John Cunningham | 19 January 1889 |
| RR/10/63 | Referee's report by William Henry Flower, on two papers 'On fossil remains of Echidna Ramsayi (Ow.). Part II' and 'Description of a newly-excluded young of the Ornithorhynchus paradoxus' by Richard Owen | 6 July 1887 |
| RR/10/65 | Letter from William Henry Flower, to John William Strutt, Lord Rayleigh, regarding a paper 'Description of a newly-excluded young of the Ornithorhynchus paradoxus' by Richard Owen | 17 November 1887 |
| RR/10/219 | Referee's report by William Henry Flower, on a paper 'Researches on the structure, organisation, and classification of the Fossil Reptilia. IV. On a large humerus from the East Brak River, South Africa, indicating a new order of fossil animals which was more nearly intermediate between reptiles and mammals than the groups hitherto known' by Harry Govier Seeley | 12 June 1888 |
| MC/9/166 | Letter from W H [William Henry] Flower, Royal College of Surgeons of England, London, to [Walter] White, [Assistant Secretary of the Royal Society] | 23 February 1871 |
| MC/9/310 | Letter from W H [William Henry] Flower, Royal College of Surgeons of England, London, to Professor [William Hallowes] Miller, [Foreign Secretary of the Royal Society] | 24 January 1872 |
| MC/9 | Volume 9 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1870-June 1873 |
| MC/10/150 | Letter from W H [William Henry] Flower, Royal College of Surgeons of England, Lincoln's Inn Fields, to the Royal Society | 11 September 1874 |
| MC/10/458 | Letter from W H [William Henry] Flower, Royal College of Surgeons of England, Lincoln's Inn Fields, to W [Walter] White, [Assistant Secretary of the Royal Society] | 6 November 1876 |
| MC/10 | Volume 10 of miscellaneous correspondence regarding business matters, sent to the Royal Society | July 1873-1876 |
| MC/11/156 | Letter from W H [William Henry] Flower, Royal College of Surgeons of England, Lincoln's Inn Fields, to [Walter] White, [Assistant Secretary of the Royal Society] | 16 January 1878 |
| MC/11 | Volume 11 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1877-1879 |
| MC/12/357 | Letter from W H [William Henry] Flower, Royal College of Surgeons of England, Lincoln's Inn Fields, to [Michael] Foster, [Secretary of the Royal Society] | 24 October 1883 |
| MC/12 | Volume 12 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1880-1883 |
| MS/427/36 | Copy letter from [Thomas Henry] Huxley, Secretary of the Royal Society; to the Secretary, Treasury | 18 June 1880 |
| RR/4/96 | Referee's report by Thomas Henry Huxley, on a paper 'On the posterior lobes of the cerebrum of the quadrumana' by William Henry Flower | 29 October 1861 |
| RR/6/96 | Referee's report by William Henry Flower, on a paper 'Ovibos moschatus (Blainville)' by William Boyd Dawkins | 17 July 1867 |
| RR/6/210 | Referee's report by William Henry Flower, on two papers 'On remains of a large extinct lama (Palauchenia magna, Owen) from quaternary deposits in the Valley of Mexico' and 'On the molar teeth, lower jaw, of Macrauchenia patachonica, Ow' by Richard Owen | 9 September 1869 |
| AP/58/11 | Unpublished paper, 'Comparative anatomy of the auditory ossicula of the Mammalia. Part I' by Alban H [Henry Griffiths] Doran | 1876 |
| AP/58/11/1 | Unpublished manuscript, 'Comparative anatomy of the auditory ossicula of the Mammalia. Part I' by Alban H [Henry Griffiths] Doran | 1876 |
| RR/9/175 | Referee's report by William Henry Flower, on two papers 'On the skeleton of the marsipobrancli fishes. Part I - The myxinoids (Myxine, and Bdellostoma)' and 'On the skeleton of the marsipohranch fishes. Part II - Petromyzon' by William Kitchen Parker | 25 January 1883 |
| RR/9/229 | Letter from William Henry Flower, on four papers 'Description of teeth of a large extinct (marsupial ?) genus, Sceparnodon, Ramsay', 'Evidence of a large extinct monotreme (Echidna Ramsayi, Ow.) from the Wellington Breccia Cave, New South Wales', 'Evidence of a large extinct lizard (notiosaurus dentatus, Owen) from pleistocene deposit, new south wales, Australia' and 'Description of parts of a human skeleton from a pleistocene (palaeolithic) bed, Tilbury, Essex' by Richard Owen to the Secretary of the Royal Society | 6 February 1884 |
| NLB/3/774 | Copy letter from Herbert Rix, to Professor William Henry Flower, Fellow of the Royal Society | 7 October 1889 |
| AP/67/2 | Unpublished paper, 'On the anatomy and physiology of Protopterus annectens [West African lungfish, Tana lungfish]' W N [William Newton] Parker | 1891 |
| RR/7/102 | Referee's report by William Henry Flower, on a paper 'Description of Ceratodus, a genus of Ganoid fishes, recently discovered in rivers of Queensland, Australia' by Albert Günther | 19 April 1871 |
| PP/17/2 | Paper, 'On the generic identity of Sceparnodon and Phascolonus' by R [Richard] Lydekker | 1890 |
| MC/15/328 | Letter from [William Henry] Flower, British Museum (Natural History), Cromwell Road, London, to the Secretary of the Royal Society | 2 December 1892 |
| MC/14/119 | Letter from [William Henry] Flower, British Museum, South Kensington, to [Michael Foster] | 22 March 1886 |
| PT/64/7 | Paper, 'On the posterior lobes of the cerebrum of the quadrumana' by William Henry Flower | [1861] |
| RR/7/392 | Referee's report by William Henry Flower, on a paper 'On the fossil mammals of Australia. Part X - family macropodidae: mandibular dentition and parts of the skeleton of palorchestes; additional evidences of macropus titan, sthenurus, and procoptodon' by Richard Owen | 16 October 1875 |
| RR/9/261 | Referee's report by William Henry Flower, on a paper 'Contributions to the history of the pleiocene and pleistocene deer. Part I. Cervus verticornis, Cervus savini' by William Boyd Dawkins | 14 August 1885 |
| RR/10/61 | Referee's report by William Henry Flower, on a paper 'On parts of the skeleton of Meiolania platyceps (Ow.)' by Richard Owen | 7 June 1887 |
| RR/10/66 | Referee's report by William Henry Flower, on a paper 'On the morphology of birds' by William Kitchen Parker | 8 March 1887 |
| RR/10/87 | Referee's report by William Henry Flower, on a paper 'Researches on the structure, organization, and classification of the fossil reptilia.—III. On parts of the skeleton of a mammal from Triassic rocks of Klipfontein, Fraserberg, South Africa (Theriodesmus phylarchus, Seeley), illustrating the reptilian inheritance in the mammalian hand' by Harry Govier Seeley | 22 November 1887 |
| RR/10/200 | Referee's report by William Henry Flower, on a paper 'On the skull of a marsupial carnivore Thylacopardus australis' by Richard Owen | 17 October 1889 |
| RR/10/202 | Second referee's report by William Henry Flower, on a paper 'On the skull of a marsupial carnivore Thylacopardus australis' by Richard Owen | 18 May 1888 |
| RR/10/221 | Referee's report by William Henry Flower, on a paper 'Researches on the structure, organization, and classification of the fossil reptilia.—V. On associated bones of a small anomodont reptile, keirognathus cordylus (Seeley), showing the relative dimensions of the anterior parts of the skeleton, and structure of the fore-limb and shoulder girdle' by Harry Govier Seeley | 13 June 1888 |
| RR/9/231 | Referee's report by William Henry Flower, on four papers 'Description of teeth of a large extinct (marsupial ?) genus, Sceparnodon, Ramsay', 'Evidence of a large extinct monotreme (Echidna Ramsayi, Ow.) from the Wellington Breccia Cave, New South Wales', 'Evidence of a large extinct lizard (notiosaurus dentatus, Owen) from pleistocene deposit, new south wales, Australia' and 'Description of parts of a human skeleton from a pleistocene (palaeolithic) bed, Tilbury, Essex' by Richard Owen | 28 February 1884 |
| MC/15/88 | Letter from [William Henry] Flower, British Museum (Natural History), Cromwell Road, London, to [John] Evans | 1 July 1890 |
| MC/15/136 | Letter from Charles Davies Sherborn, 540 Kings Road, London, to Professor [William Henry] Flower | 2 February 1891 |
| MC/16/216 | Letter from [William Henry] Flower, British Museum (Natural History), Cromwell Road, London, to [Michael] Foster | 17 May 1895 |
| MC/16/40 | Letter from [William Henry] Flower, British Museum (Natural History), Cromwell Road, London, to John Evans, Treasurer of the Royal Society | 24 May 1893 |
| MC/15/152 | Letter from [William Henry] Flower, Director, British Museum (Natural History), Cromwell Road, London, to the Secretary of the Royal Society | 6 March 1891 |
| MC/14/57 | Letter from Sir William Henry Flower, British Museum, South Kensington, to [Thomas Henry] Huxley | 30 June 1885 |
| MC/16/285 | Letter from [William Henry] Flower, British Museum (Natural History), Cromwell Road, London, to [Michael] Foster | 5 February 1896 |
| MC/16/305 | Letter from [William Henry] Flower, British Museum (Natural History), Cromwell Road, London, to Dr [Michael] Foster, Secretary of the Royal Society | 4 April 1896 |
| MC/14/276 | Letter from [William Henry] Flower, British Museum (Natural History), Cromwell Road, London, to the President of the Royal Society | 14 December 1887 |
| MC/16/347 | Letter from [Charles Immanuel] Forsyth Major, British Museum (Natural History), Cromwell Road, to Sir William [Henry] Flower | 9 November 1896 |
| MC/14 | Volume 14 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1885-1888 |
| MC/14/141 | Letter from Sir William Henry Flower, British Museum, South Kensington, to the Secretary of the Royal Society | 29 July 1886 |
| MC/16 | Volume 16 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1893-1896 |
| MC/16/346 | Letter from [William Henry] Flower, British Museum (Natural History), Cromwell Road, South Kensington, to Professor Michael Foster | 11 November 1896 |