| Reference number | NLB/68/215 |
| Alternative reference number | NLB/68 p116 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to J. W. H. Harrison Esq.; Armstrong College |
| Date | 29 May 1925 |
| Description | Thanks J. W. Harrison for his letter and apologises for troubling him, since Towle has since found the Watson lens while examining the packing (although notes that it will not be much use after two years in the tropics). |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |