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).
Modifications to the 25 HP exhaust system as fitted to the 10,000 miles car.
| Identifier | ExFiles\Box 104\2\ scan0093 | |
| Date | 24th July 1934 | |
| By.{R.W. Bailey - Chief Engineer} x5230 Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager}18/KW.24.7.34. 25 HP. Exhaust System. Herewith drawing Hs.{Lord Ernest Hives - Chair}1436 shewing modifications to existing standard system, and as fitted to our 10,000 miles car 21-G-IV. Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager} | ||