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).
With sketches detailing two designs for road springs, including quantities and annotations.
| Identifier | ExFiles\Box 3\1\ 01-page182 | |
| Date | 12th February 1913 guessed | |
| C O P Y. Wormald ROAD SPRINGS. Re R12/B14213. "A" x 49 "B" x 237 hardened surface. Roller Usual shop pin (Sd) ABrodwell | ||