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).
Confirming an opinion on the 20 HP model.
| Identifier | ExFiles\Box 5a\2\ 02-page026 | |
| Date | 1st January 1929 guessed | |
| WOR{Arthur Wormald - General Works Manager} X5840C This rather confirms our opinion of The 20 H.P. Rm.{William Robotham - Chief Engineer} Rm.{William Robotham - Chief Engineer} Thanks [illegible initials] | ||