Pencil sketches of various mechanical components.
| Identifier | Morton\M6\ img013 | |
| Date | 1st November 1929 guessed | |
| "MARTLET" MR WILLETT. MAW. MR. CHICHESTER. | ||
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).