| Reference number | NLB/54/790 |
| Alternative reference number | NLB/54 p446 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Hugh Longbourne] Callendar, Chairman of the Mathematics Committee and FRS |
| Date | 3 October 1917 |
| Description | Acknowledges the receipt of Professor [Hugh Longbourne] Callendar's letter with Dr. Allen's paper. Apologises that a return envelope was not sent with the paper. Offers to send Professor Callendar some more stamps if he needs them. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |