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 regarding barrel-type tappets for the B.III and Phantom III models.
| Identifier | ExFiles\Box 100\3\ scan0008 | |
| Date | 9th August 1938 | |
| HSH Rm{William Robotham - Chief Engineer} Da.{Bernard Day - Chassis Design}1/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 9.8.38 B.III + Phantom III Barrel type tappets file 1360 | ||