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).
For the file on 'Silver Ripple I', mentioning mileage and other details.
| Identifier | ExFiles\Box 98\5\ scan0188 | |
| Date | 13th June 1939 | |
| #00f. HPS.{Horace Percy Smith - Experimental Factory Mgr} Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} 11/JH. 13.6.39 Silver Ripple I - 12.B.V, 15,000 miles car file 1022, | ||