| Reference Number | Title | Date |
| RCPI/2/3/2/13/252 | Letter to W. H. Wright, Neath. | 6 October 1917 |
| RCPI/2/3/2/13/258 | Letter to W. H. Wright, Neath. | 5 November 1917 |
| RCPI/2/3/1/59/Upsilon41 | Membership application of William Henry Wright | 27 June-19 July 1917 |
| RCPI/2/3/1/59/Upsilon45 | Letter from William Henry Wright, Neath, South Wales | [July 1917] |
| RCPI/2/3/1/59/Upsilon41/1 | Letter from William Henry Wright, Neath, Clamorganshire | 27 July 1917 |
| RCPI/2/3/1/59/Upsilon41/2 | Membership application form of William Henry Wright | 16 July 1917 |
| RCPI/2/3/1/59/Upsilon41/3 | Signed declaration made by William Henry Wright | [July 1917] |
| RCPI/2/3/1/59/Upsilon41/4 | Letter to William Henry Wright, Neath, South Wales | 19 July 1917 |
| RCPI/2/3/1/59/Upsilon52 | Letter from William Henry Wright, Neath, South Wales | 10 October 1917 |