| Reference number | NLB/60/860 |
| Alternative reference number | NLB/60 p484 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Messrs Harrison & Sons] |
| Date | 16 April 1921 |
| Description | 'Herewith copy for advertisement in "Nature" of April 28th, and corresponding issue of "Engineering". Please let us have a proof if possible.' [Not enclosed.] |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |