From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Faint pencil sketch with handwritten annotations and numbers.
| Identifier | ExFiles\Box 4\7\ 07-page26 | |
| Date | 27th July 1912 guessed | |
| 17XX 275 Patterson | ||