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).
List of purchased parts for a P. III gearbox, detailing materials and prices.
| Identifier | ExFiles\Box 94\2\ scan0131 | |
| Date | 21th December 1936 | |
| 328 Rm.{William Robotham - Chief Engineer} ROY{Sir Henry Royce}/MS6/P.21.12.36. P. III GEARBOX. With further reference to Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}23/AF.8.12.36, the following details are purchased at prices as follows:- Piece No. Material. Price. G.83292 Ubas. 1/4d each. " 5% Nickel Steel. 1/5d " G.83352.F. Ubas. 2/6d " " 5% Nickel Steel. 2/11d " Roy{Sir Henry Royce} | ||