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).
Telegram regarding the quality and specifications of switchbox screws and spring washers.
| Identifier | WestWitteringFiles\I\October1922\ Scan2 | |
| Date | 3rd October 1922 | |
| H6 Roycar Derby. Clarke re switchboxes screws are brittle will they not do better in steel they are also too short and spring washers are badly shaped should be like weston. Royce. | ||