| Reference number | NLB/9/519 |
| Alternative reference number | NLB/9 p257 |
| Level | Item |
| Title | Copy letter from an unknown correspondent, to The Swan Electric Engraving Company |
| Date | 30 May 1894 |
| Description | 'Can you tell us at what date you expect to deliver Prof. Hartley's plates to Messrs Harrisons?' |
| Extent | 1p |
| Format | Carbon |
| Physical description | Typescript |
| Access status | Open |