| RefNo | FS/7/2/573 | 
| Previous numbers | FS/14/2/26, Box 10 | 
| Level | File | 
| Title | Correspondence with Dr DP Riley | 
| Date | 1949 | 
| Description | Mostly on Sir Robert Robertson's attempts to synthesise diamonds | 
| Extent | 3 letters | 
| Format | Manuscript and typescript documents | 
| AccessStatus | Open |