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).
Note confirming that the 25 HP engine unit in car 19-G-IV is not a standard model.
| Identifier | ExFiles\Box 154\1\ scan0201 | |
| Date | 16th November 1934 | |
| 3573 W/P {Derby Works / Production} - Sr. Hs {Lord Ernest Hives - Chair} /RM. {William Robotham - Chief Engineer} 19/KW.16.11.34. 19-G-IV. We have seen your note to Leslie re The 25 HP. unit in this car is not standard. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||