| Reference number | NLB/52/226 |
| Alternative reference number | NLB/52 p128 |
| Level | Item |
| Title | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to E. Channell Esquire |
| Date | 19 October 1915 |
| Description | 'your book entitled "The Simplification of the Arithmetical Processes of Involution and Evolution".' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |