| Reference number | NLB/42/397 |
| Alternative reference number | NLB/42 p249 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison to W Geoffrey Duffield, DSc, Physical Laboratories, University, Machester |
| Date | 4 June 1910 |
| Description | 'Dear Sir,
In accordance with your request, I herewith return your Paper for the purpose mentioned in your letter. I should be much obliged by your returning it here at the earliest possible moment.' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |