| Reference number | NLB/35/434 |
| Alternative reference number | NLB/35 p277 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, to Messrs Barker & Son, Sundial House, 12 Clerkenwell Road |
| Date | 31 May 1907 |
| Description | 'Sirs,
[blank space] yesterday and to say that the makers of the helio-chronometer are Messrs Pilkington & Gibbs, Ltd., 7 Lune Street, Preston'. |
| Extent | 1p |
| Format | Carbon |
| Physical description | Manuscript |
| Access status | Open |