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).
Page 2 of a typed document describing a disc with attached spokes.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page022 | |
| Date | 7th February 1913 guessed | |
| -2- really a disc in line with the spokes which are attached thereto. | ||