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).
Memo regarding bonnets, cross-referencing another file.
| Identifier | ExFiles\Box 98\3\ scan0153 | |
| Date | 1st March 1939 | |
| Rm.{William Robotham - Chief Engineer} 405 Da{Bernard Day - Chassis Design} 10/9. 1.3.39. re bonnets. see file 1026, | ||