| RefNo | ACS/1/1/257 | 
| Level | Item | 
| Title | Letter from [Henry Reginald Arnulph] Mallock, 6 Cresswell Gardens, S. W., to [Alan Archibald Campbell] Swinton | 
| Creator | Mallock; Henry Reginald Arnulph (1851 - 1933); scientific instrument designer and experimentalist | 
| Date | 20 July 1917 | 
| Description | Informs he cannot accept Swinton's invitation to dinner as he will not be in London. | 
| Extent | 2p | 
| Format | Manuscript | 
| PhysicalDescription | Ink on paper | 
| AccessStatus | Open | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA1356 | Mallock; Henry Reginald Arnulph (1851 - 1933); scientific instrument designer and experimentalist | 1851 - 1933 | 
| NA8285 | Swinton; Alan Archibald Campbell (1863 - 1930); electrical engineer | 1863 - 1930 |