| RefNo | FS/7/2/457 | 
| Previous numbers | FS/14/2/26, Box 7 | 
| Level | File | 
| Title | Correspondence with Sir Thomas Merton | 
| Date | 9 January 1952  | 
| Description | Mostly on Simon's suggestions for preventing high temperatures on the London Underground | 
| Extent | 5 letters | 
| Format | Manuscript and typescript documents | 
| AccessStatus | Open |