| Reference number | NLB/51/649 |
| Alternative reference number | NLB/51 p401 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society Messrs Harriosn and Sons |
| Date | 13 May 1915 |
| Description | 'Weekly Papers for reading List.
Please note Prof Petries'' remarks on the accompanying postcard as to 1/2 post and closed envelopes, and take the necessary steps to prevent recurrence.' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |