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).
To Mr. Hives comparing the slowest speeds of various cars and the performance of a Marmon tyre pump.
| Identifier | ExFiles\Box 32\5\ Scan147 | |
| Date | 17th March 1921 | |
| 1692 2 17.3.21. Mr. Hives, x.1692 4213 Marmon tyre pump 500 r.p.m. pumps 60 lbs. in 10 mins. x 1525 lowest slow speed 3.25 M.P.H. 40 M.P.H. speedometer x 3923 38.3 M.P.H. (time) Dodge - slowest speed 6.3 M.P.H. 40 M.P.H. speedometer 40.9 M.P.H. (time) Humber - slowest speed 4.5 40 M.P.H. speedometer 38.3 M.P.H. time. 6.EX slowest speed 3.75 M.P.H. 40 M.P.H. speedometer 38.3 M.P.H. (time. GWH.{George W. Hancock - Head Chateauroux} | ||