| Reference number | NLB/43/26 |
| Alternative reference number | NLB/43 p17 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, to Professor Duffield, University College, Reading |
| Date | 24 October 1910 |
| Description | The Secretaries would like to remind Duffield that proofs of his paper on 'Arc Spectra' were sent to him on 17 August, and they have not returned. |
| Extent | 1p |
| Format | Carbon |
| Physical description | Typescript |
| Access status | Open |