| RefNo | Title | Date |
| MM/21/91 | Letter from Davies Gilbert | 23 March 1823 |
| IM/Maull/000255 | Barlow, William Henry | nd |
| MC/19/40 | Letter from Crawford Barlow, Fordwich House, Fordwich, Kent, to the Secretary of the Royal Society | 5 March 1904 |
| RR/3/15 | Referee's report by William Fairbairn, on a paper 'On an element of strength in beams subjected to transverse strain, named by the author - the resistance of flexure' by William Henry Barlow | 21 April 1857 |
| AP/52/1/3 | Unpublished diagrams, geometrical diagrams by William Henry Barlow | 1870 |
| PT/51/1/3 | Plate, seven girders by J F Chappé | [1855] |
| EC/1850/06 | Barlow, William Henry: certificate of election to the Royal Society | |
| RR/7/9 | Referee's report by William John Macquorn Rankine, on a paper 'On the cause and theoretic value of the resistance of flexure in beams' by William Henry Barlow | 1870 |
| PT/51/1/1 | Manuscript, 'On the existence of an element of strength in beams subjected to transverse strain, arising from the lateral action of the fibres or particles on each other, and named by the author the "resistence [sic] of flexure"' by William Henry Barlow | [1855] |
| PT/35/4 | Paper, 'On the spontaneous electrical currents observed in the wires of the electric telegraph' by W H [William Henry] Barlow | [1848] |
| PT/51/1/2 | Plate, beams and measuring instruments by J F Chappé | [1855] |
| RR/2/13 | Referee's report by Robert Stephenson, on a paper 'On the existence of an element of strength in beams subjected to transverse strain, arising from the lateral action of the fibres or particles on each other, and named by the author "Resistance of Flexure"' by William Henry Barlow | 28 June 1855 |
| PT/58/8/3 | Plate, forms of iron bars numbered 1-4 by unknown artist | [1857] |
| PT/58/8/1 | Manuscript, 'On an element of strength in beams subjected to transverse strain, named by the author "the resistance of flexure"' by William Henry Barlow | [1857] |
| PT/58/8/5 | Plate, forms of iron bars numbered 24, 30, and 34-35 by unknown artist | [1857] |
| PT/58/8/2 | Plate, figures 1-7 showing cylindrical and square bars with flanges and centre of rectangular beam by A A Langley | [1857] |
| PT/58/8/4 | Plate, forms of iron bars numbered 9, 11-12, 19, and 23 by unknown artist | [1857] |
| AP/52/1/2 | Unpublished figures, beams by W H [William Henry] Barlow | 1870 |
| PT/51/1 | Paper, 'On the existence of an element of strength in beams subjected to transverse strain, arising from the lateral action of the fibres or particles on each other, and named by the author the "resistence [sic] of flexure"' by William Henry Barlow | [1855] |
| AP/30/2 | Unpublished paper, 'On the existence of alternating diurnal currents of electricity at the terrestrial surface and their connection with the diurnal variation of the horizontal magnetic needle' by W H [William Henry] Barlow | June 1847 |
| AP/31/2 | Paper, 'On the spontaneous electrical currents observed in the wires of the electric telegraph' by W H [William Henry] Barlow | 1848 |
| AP/31/2/1 | Manuscript, 'On the spontaneous electrical currents observed in the wires of the electric telegraph' by W H [William Henry] Barlow | 1848 |
| MC/12/113 | Letter from W H [William Henry] Barlow, High Combe, Old Charlton, to the Royal Society | 6 November 1880 |
| RR/3/273 | Referee's report by William Henry Barlow, on a paper 'A system of train-signalling, by which also disabled trains may telegraph for assistance without the aid of portable apparatus' by Charles Vincent Walker | 9 July 1857 |
| AP/52/1 | Unpublished paper, 'On the cause and theoretic value of the resistance of flexure in beams subject to transverse stress' by W H [William Henry] Barlow | 1870 |
| MC/12/273 | Letter from W H [William Henry] Barlow, High Combe, Old Charlton, to [William] Spottiswoode, [President of the Royal Society] | 2 October 1882 |
| MC/12 | Volume 12 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1880-1883 |
| PT/58/8 | Paper, 'On an element of strength in beams subjected to transverse strain, named by the author "the resistance of flexure"' by William Henry Barlow | [1857] |
| AP/52/1/1 | Unpublished manuscript, 'On the cause and theoretic value of the resistance of flexure in beams subject to transverse stress' by W H [William Henry] Barlow | 1870 |
| RR/7/8 | Referee's report by William Thomson, Lord Kelvin on a paper 'On the cause and theoretic value of the resistance of flexure in beams' by William Henry Barlow | 8 June 1870 |
| RR/2/14 | [Copy of RR/2/13] Referee's report by Robert Stephenson, on a paper 'On the existence of an element of strength in beams subjected to transverse strain, arising from the lateral action of the fibres or particles on each other, and named by the author "Resistance of Flexure"' by William Henry Barlow | 28 June 1855 |
| RR/2/12 | Referee's report by William John Macquorn Rankine, on a paper 'On the existence of an element of strength in beams subjected to transverse strain, arising from the lateral action of the fibres or particles on each other, and named by the author "Resistance of Flexure"' by William Henry Barlow | 29 April 1855 |
| MC/19/41 | Letter from Crawford Barlow, Fordwich House, Fordwich, Kent, to [Robert William Frederick] Harrison, Assistant Secretary of the Royal Society | 8 March 1904 |
| MC/19/42 | Letter from Crawford Barlow, Fordwich House, Fordwich, Kent, to the Secretary of the Royal Society | 10 December 1904 |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |