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).
From Sg. to Rm. regarding the trial of B.50 and a breach of security protocol.
| Identifier | ExFiles\Box 111\2\ scan0398 | |
| Date | 31th October 1938 | |
| 800 Miss Reece To Rm.{William Robotham - Chief Engineer} from Sg.{Arthur F. Sidgreaves - MD} Trial of B.50. Sg{Arthur F. Sidgreaves - MD}17/E11138 Referring to your Rm{William Robotham - Chief Engineer}1/R.31.10.38 I quite agree and leave it to you to tell me when I may have the trial. B.50 of course is still on the secret list but I notice that your memo. came through to me without a covering envelope. Sg.{Arthur F. Sidgreaves - MD} | ||