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).
Official order for a silencer that has been fitted to an experimental car.
| Identifier | ExFiles\Box 152\3\ scan0314 | |
| Date | 4th October 1939 | |
| 4297 To Les.{Ivan A. Leslie} c. to G/JWH. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}4/JH.4.10.39. Will you please send an official order to Burgess Products Co.Ltd. Hinckley, Leicester for 1 Burgess silencer X549/A.{Mr Adams} This silencer has been brought to the works and fitted to an exptl. car. O/N.52509. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | ||