| Reference number | NLB/58/788 |
| Alternative reference number | NLB/58 p425 |
| Level | Item |
| Title | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to F. Simeon Esquire of Messrs Adam Hilger Ltd.; 75A Camden Road, N.W.l. |
| Date | 18 June 1920 |
| Description | Regretfully informs Mr. F. Simeon that he will not be able to show the Vacuum Spectrograph at their upcoming Soiree, owing to its overly technical nature. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |