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).
Concluding note stating that further information is unavailable until applications are completed and published.
| Identifier | ExFiles\Box 147\2\ scan0007 | |
| Date | 12th January 1939 guessed | |
| It should be noted that it is not possible to obtain further information regarding the above until or unless the applications are completed and published. -------- | ||