| Reference number | NLB/43/322 |
| Alternative reference number | NLB/43 p196 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, to Mrs [Hertha] Ayrton |
| Date | 10 December 1910 |
| Description | Her paper has been duly received and its receipt acknowledged to Professor [John Henry] Poynting, the communicator. |
| Extent | 1p |
| Format | Carbon |
| Physical description | Typescript |
| Access status | Open |