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).
List of experimental cars, specifically the B.3, B.50, and Silver Wraith models.
| Identifier | ExFiles\Box 98\2\ scan0199 | |
| Date | 9th November 1938 | |
| HOH Rm.{William Robotham - Chief Engineer} Da{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} 31/N. 9.11.38 list of experimental cars. B.3, B.50 & Silver Wraith file 1021 | ||