| Reference number | NLB/45/670 |
| Alternative reference number | NLB/45 p404 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison to A Roodhuysen, 6 van Lennepweg, The Hague, Holland |
| Date | 22 April 1912 |
| Description | 'As requested in your postcard of the 19th, I am sending you a Year-Book of the Royal Society, and would draw your attention to page 167.' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |