| Reference number | NLB/3/639 |
| Alternative reference number | NLB/3 p311 |
| Level | Item |
| Title | Copy letter from an unknown correspondent, to Messrs West, Newman & Company |
| Date | 29 July 1889 |
| Description | 'Herewith Dr Hopkinson's answer about the groupings of his curves. Will you see that his instruction is attended to'. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |