Hand-drawn sketch of a float mechanism with some cursive doodles.
| Identifier | ExFiles\Box 40\5\ Scan041 | |
| Date | 19th March 1920 guessed | |
| Illegible text at the top of the page. Three cursive doodles in the top left corner. | ||
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).