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).
Blueprint illustrating three different designs for E.R.A. Axle Half Shafts.
| Identifier | ExFiles\Box 114\1\ scan0117 | |
| Date | 21th December 1937 guessed | |
| E.{Mr Elliott - Chief Engineer} R.{Sir Henry Royce} A.{Mr Adams} AXLE HALF SHAFTS. 1. 2. 3. A Rm{William Robotham - Chief Engineer} 483 | ||