| RefNo | Title | Date |
| EC/1840/06 | Pritchard, Charles: certificate of election to the Royal Society | |
| MM/12/116 | Letter from Charles Pritchard to William White | 12 June 1880 |
| NLB/2/846 | Copy letter from Herbert Rix, to Rev Professor Charles Pritchard, Fellow of the Royal Society | 21 November 1888 |
| NLB/2/862 | Copy letter from Herbert Rix, to Rev Professor Charles Pritchard, Fellow of the Royal Society | 27 November 1888 |
| NLB/1/581 | Copy letter from Herbert Rix, to Professor Charles Pritchard, Fellow of the Royal Society | 27 September 1887 |
| NLB/1/192 | Copy letter from Herbert Rix, to the Reverend Professor Charles Pritchard, DD, Fellow of the Royal Society | 2 October 1886 |
| NLB/1/573 | Copy letter from Herbert Rix, to Professor Charles Pritchard, Fellow of the Royal Society | 22 September 1887 |
| NLB/1/571 | Copy letter from Herbert Rix, to Professor Charles Pritchard, Fellow of the Royal Society | 21 September 1887 |
| NLB/7/938 | Copy letter from Theodore E James, to Messrs Harrison & Sons | 31 May 1893 |
| NLB/3/210 | Copy letter from Herbert Rix, to Rev Professor Charles Pritchard, Fellow of the Royal Society | 10 April 1889 |
| NLB/7/95 | Copy letter from Herbert Rix, to Dr Charles Pritchard | 28 November 1892 |
| NLB/4/758 | Copy letter from Herbert Rix, to the Reverend Dr Charles Pritchard, Fellow of the Royal Society | 17 October 1890 |
| NLB/7/45 | Copy letter from Herbert Rix, to Reverend Dr Charles Pritchard, Fellow of the Royal Society | 17 November 1892 |
| NLB/6/1158 | Copy letter from Michael Foster, to General Sir Henry Frederick Ponsonby | November 1892 |
| NLB/7/8 | Copy letter from Michael Foster, to Reverend Professor Charles Pritchard, Fellow of the Royal Society | [10 November 1892] |
| MS/427/433 | Cutting of Board of Visitors of the Royal Observatory meeting, Resolution 5 and 6 | 18 June 1885 |
| HSF/1/3/18 | Letter from C [Charles] Pritchard, to Sir John [Frederick William Herschel] | 12 May [1849] |
| RR/10/4 | Referee's report by Charles Pritchard, on a paper 'Total eclipse of the sun observed at Caroline Island, on 6th May, 1883' by William de Wiveleslie Abney | 28 June 1887 |
| MC/3 | Volume 3 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1839-1843 |
| MC/3/138 | Letter from Rev. [Charles] Pritchard, Clapham, to the Council of the Royal Society | 6 February 1841 |
| MC/7/3 | Letter from C [Charles] Pritchard, Hurst Hill, Freshwater, Isle of Wight, to the Royal Society | 14 January 1864 |
| MC/7/10 | Letter from Edward Sabine, [President of the Royal Society], Woolwich, to W [Walter] White, [Assistant Secretary of the Royal Society] | 2 February 1864 |
| MC/7 | Volume 7 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1864-1866 |
| MC/10/295 | Letter from C [Charles] Pritchard, The University Observatory, Oxford, to W [Walter] White, [Assistant Secretary of the Royal Society] | 20 October 1875 |
| MC/10 | Volume 10 of miscellaneous correspondence regarding business matters, sent to the Royal Society | July 1873-1876 |
| MC/12/343 | Letter from C [Charles] Pritchard, Oxford, to [Walter] White, [Assistant Secretary of the Royal Society] | 1 July 1883 |
| MC/12 | Volume 12 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1880-1883 |
| PP/9/3 | Paper, 'Researches in stelllar photography. 1. In its relation to the photometry of the stars. 2. Its applicability to astronomical measurements of great precision' by Charles Pritchard | 1886 |
| PP/9/3/1 | Manuscript, 'Researches in stelllar photography. 1. In its relation to the photometry of the stars. 2. Its applicability to astronomical measurements of great precision' by Charles Pritchard | 1886 |
| PP/9/3/2 | Unpublished photographs, 'Part of the Pleiades' by Charles Pritchard | 1886 |
| PP/9/3/3 | Diagram, 'Diagram of stars in the Pleiades, as seen in an inverting telescope' by Charles Pritchard | 1886 |
| PP/12/9/1 | Manuscript, 'Report on the capacities, in respect of light and photographic action, of two silver on glass mirrors of different focal lengths' by C [Charles] Pritchard | 1888 |
| PP/12/9 | Paper, 'Report on the capacities, in respect of light and photographic action, of two silver on glass mirrors of different focal lengths' by C [Charles] Pritchard | 1888 |
| RR/6/164 | Letter from Charles Pritchard, to Warren De La Rue, regarding a paper 'Spectroscopic observations of the sun.—No. II' by Joseph Norman Lockyer | 16 December 1868 |
| MC/15/315 | Letter from [Charles] Pritchard, University Observatory, Oxford, to Professor [Michael] Foster | 13 November 1892 |
| PP/12/9/2 | Figures, photographic plates by C [Charles] Pritchard | 1888 |
| MC/14 | Volume 14 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1885-1888 |
| MC/14/330 | Letter from [Charles] Pritchard, Oxford University Observatory, to the Secrearies of the Royal Society | 6 June 1888 |
| MC/15 | Volume 15 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1889-1892 |
| HSF/1/2/61 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 6 January 1866 |
| HSF/1/3 | Letters of Charles Pritchard to Sir John Frederick William Herschel | 1844-1880 |
| HSF/1/3/1 | Circular letter from Charles Pritchard, St. John's College, Cambridge to 'Dear Sir' [Sir John Frederick William Herschel] | 19 January 1844 |
| HSF/1/3/5 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 29 November [1844] |
| HSF/1/3/4 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 28 November 1844 |
| HSF/1/3/6 | Letter from C [Charles] Pritchard, [Clapham], to Sir John [Frederick William Herschel] | no date [30 November 1844] |
| HSF/1/3/7 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | no date [early 1845, or early 1846] |
| HSF/1/3/8 | Letter from C [Charles] Pritchard, Bowness, Westmoreland, to Sir John [Frederick William Herschel] | 12 July 1845 |
| HSF/1/3/9 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 24 November 1845 |
| HSF/1/3/11 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 14 April 1846 |
| HSF/1/3/12 | Letter from C [Charles] Pritchard, Euston Square Hotel, to Sir John [Frederick William] Herschel, Collingwood, Hawkshurst, Kent | no date 'Saturday' [3 October 1846. Postmark 5 October] |
| HSF/1/3/13 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William] Herschel, Collingwood, Hawkshurst, Kent | 16 December 1846 |
| HSF/1/3/2 | Letter from Charles Pritchard, Clapham, to Sir John [Frederick William Herschel] | 28 March 1844 |
| HSF/1/3/14 | Circular letter from C [Charles] Pritchard, Bowness, Windermere, Clapham, to Sir John [Frederick William Herschel] | 12 January 1848 |
| HSF/1/3/17 | Letter from C [Charles] Pritchard, Clapham to Sir John [Frederick William Herschel] | 2 October 1848 |
| HSF/1/3/15 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 3 May [1848] |
| HSF/1/3/16 | Letter from C [Charles] Pritchard, Clapham to Sir John [Frederick William Herschel] | 19 June 1848 |
| HSF/1/3/19 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William] Herschel | 18 June [no year, 1849?] |
| HSF/1/3/3 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William] Herschel | 19 June 1844 [possibly 1849?] |
| HSF/1/3/24 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 13 July 1850 |
| HSF/1/3/23 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 18 June [1850?] |
| HSF/1/3/25 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 28 July [1850] |
| HSF/1/3/10 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 21 January 1846 |
| HSF/1/3/22 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 18 [13?] December [1849?] |
| HSF/1/3/20 | Incomplete letter from C [Charles] Pritchard, Shanklin, I W [Isle of Wight], to Sir John [Frederick William] Herschel | 18 July [no year, 1849?] |
| HSF/1/3/21 | Letter from C [Charles] Pritchard, Shanklin, to Sir John [Frederick William Herschel] | 2 August [no year, 1849?] |
| HSF/1/3/26 | Letter from C [Charles] Pritchard, Clapham, to Lady [Margaret Brodie] Herschel | 31 July 1855 |
| HSF/1/3/29 | Letter from C [Charles] Pritchard, to Sir John [Frederick William Herschel] | 9 September [no year] |
| HSF/1/3/28 | Letter from C [Charles] Pritchard, to Sir John [Frederick William Herschel] | 23 June [no year] |
| HSF/1/3/30 | Letter from C [Charles] Pritchard, to Sir John [Frederick William Herschel] | 16 May 1857 |
| HSF/1/3/27 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 17 August [no year, w.m. 1855] |
| HSF/1/3/34 | Letter from C [Charles] Pritchard, Clapham, to [Alexander Stewart] Herschel | 2 July 1860 |
| HSF/1/3/31 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 5 July [no year, 1859?] |
| HSF/1/3/33 | Incomplete letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 23 June 1860 |
| HSF/1/3/32 | Letter from C [Charles] Pritchard, Pawley's Hotel, Sevenoaks, to Sir John [Frederick William Herschel] | 11 July [no year, 1859? wm 1855] |
| HSF/1/3/35 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William Herschel] | 5 July 1860 |
| HSF/1/3/50 | Letter from C [Charles] Pritchard, to Sir John [Frederick William Herschel] | 18 March 1866 |
| HSF/1/3/38 | Letter from C [Charles] Pritchard, Hurst Hill, Freshwater, I W [Isle of Wight] to Sir John [Frederick William Herschel] | 27 October 1863 |
| HSF/1/3/39 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William] Herschel | 1 March 1864 |
| HSF/1/3/40 | Letter from C [Charles] Pritchard, Honorary Secretary, Royal Astronomical Society, Freshwater, to Sir John [Frederick William Herschel] | 9 May 1864 |
| HSF/1/3/41 | Letter from C [Charles] Pritchard, Honorary Secretary, Royal Astronomical Society, London, to Sir John [Frederick William] Herschel | 20 December 1864 |
| HSF/1/3/36 | Letter from C [Charles] Pritchard, Clapham, to Sir John [Frederick William] Herschel | 26 December [no year - 1859-1860?] |
| HSF/1/3/43 | Account of a dialogue between Julia Margaret Cameron and Adam Sedgwick, by [Charles Pritchard] | 2 February 1865 |
| HSF/1/3/45 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 27 December 1865 |
| HSF/1/3/44 | Letter from C [Charles] Pritchard, [The Grosvenor Hotel, Victoria Station, Pimlico - scored through], to Sir John [Frederick William Herschel] | 9 December 1865 |
| HSF/1/3/42 | Letter from C [Charles] Pritchard, Honorary Secretary, Royal Astronomical Society, London, to Sir John [Frederick William] Herschel | 2 February 1865 |
| HSF/1/3/37 | Incomplete letter from C [Charles] Pritchard, Hurst Hill, Freshwater, I W [Isle of Wight] to [Sir John Frederick William Herschel] | 19 October 1863 |
| HSF/1/3/53 | Letter from C [Charles] Pritchard, Freshwater, to 'Dear Aleck' [Alexander Stewart Herschel] | 20 March 1866 |
| HSF/1/3/51 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 20 March 1866 |
| HSF/1/3/47 | Note on 'ethos', by [William James Herschel?] | 15 February 1894 |
| HSF/1/3/48 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 27 February 1866 |
| HSF/1/3/49 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William] Herschel | 13 March 1866 |
| HSF/1/3/52 | Note in response to John Tyndall, by Charles Pritchard | [20 March 1866] |
| HSF/1/3/46 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 31 January 1866 |
| HSF/1/3/58 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 19 October 1868 |
| HSF/1/3/54 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 27 March 1866 |
| HSF/1/3/55 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 4 October 1866 |
| HSF/1/3/59 | Letter from C [Charles] Pritchard, Royal Astronomical Society, Somerset House, to Sir John [Frederick William Herschel] | 13 March 1869 |
| HSF/1/3/57 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 22 June 1867 |
| HSF/1/3/60 | Letter from C [Charles] Pritchard, to Sir John [Frederick William Herschel] | 26 March 1869 |
| HSF/1/3/56 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 24 December 1866 |
| HSF/1/3/62 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 14 May 1869 |
| HSF/1/3/63 | Letter from C [Charles] Pritchard, 6 Keble Terrace, Oxford, to Sir John [Frederick William Herschel] | 24 April 1871 |
| HSF/1/3/64 | Letter from C [Charles] Pritchard, Observatory, Oxford University, to 'Miss Herschel' | 16 January 1880 |
| HSF/1/3/61 | Letter from C [Charles] Pritchard, Freshwater, to Sir John [Frederick William Herschel] | 10 May 1869 |