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).
To place an official order for two car heaters to Messrs. Hallam, Sleigh & Cheston.
| Identifier | ExFiles\Box 137\3\ scan0202 | |
| Date | 1st March 1940 | |
| Les.{Ivan A. Leslie} Hle 1158 Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards}3/GH.1.3.40. re CAR HEATERS. ------------ Will you please pass an official order to Messrs. Hallam, Sleigh & Cheston for two car heaters as per attached letter. Order Number 52404. Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} | ||