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 reporting issues with stretching exhaust valves and a failed front exhaust box.
| Identifier | ExFiles\Box 11\3\ 03-page161 | |
| Date | 4th July 1930 | |
| Hives Roycar Derby. In trouble with exhaust valves stretching ascertain whether Right material has been used stop front exhaust box failed writing Hancock. | ||