| Reference number | NLB/61/606 |
| Alternative reference number | NLB/61 p349 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Messrs Harrison & Sons] |
| Date | 19 September 1921 |
| Description | 'Kindly issue the attached advertisement in the issue of "Nature" appearing on the 29th September.' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |