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).
Note about hydraulic front brakes for the B.III, B.50 and Wraith 80 models.
| Identifier | ExFiles\Box 109\1\ scan0043 | |
| Date | 19th September 1938 | |
| 666 Rm.{William Robotham - Chief Engineer} Da.{Bernard Day - Chassis Design}H/G.19.9.38 Hydraulic Front Brakes. B.III, B.50 and Wraith 80 in file 1029 | ||