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 paragraph regarding the continuation of experiments and the adoption of successful improvements.
| Identifier | ExFiles\Box 73\2\ scan0019 | |
| Date | 2nd June 1923 guessed | |
| - 2 - Our experiments will continue, and should they be successful at any future date in providing any desirable improvement without risk of other disadvantages, they will of course be adopted by us. Yours faithfully, | ||