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).
The material release schedule for the Wraith 'D' Series.
| Identifier | ExFiles\Box 108\2\ scan0232 | |
| Date | 28th March 1939 | |
| 600 BY.{R.W. Bailey - Chief Engineer} & Rm.{William Robotham - Chief Engineer} From RHC.{R. H. Coverley - Production Engineer} RHC.{R. H. Coverley - Production Engineer}4/FH.28.3.39. WRAITH. With reference to our conversation on Release of Material for 'D' Series, this is scheduled to take place early in August, 1939. since Production commences at the end of February, 1940. It is suggested this matter be further discussed at next Monday's Conference. RHC.{R. H. Coverley - Production Engineer} [Signature] | ||