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 modifications and a directive for a car to proceed to Le Canadel before testing.
| Identifier | ExFiles\Box 65a\1\ scan0241 | |
| Date | 21th January 1928 guessed | |
| contd :- -2- (10) Modified slipper wheel. (11) Modified pistons. This car will also proceed to Le CanadelHenry Royce's French residence before any tests commence. Hs.{Lord Ernest Hives - Chair} | ||