| Reference number | NLB/54/478 |
| Alternative reference number | NLB/54 p269 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Messrs Dent & Co.; 61 Strand, W.C. |
| Date | 23 May 1917 |
| Description | 'Since our Shelton clock was cleaned by you, your man has discontinued recording its rate every week. I shall be glad to have this practice resumed.' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |