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).
Log of mileage tests for a component labelled '4BIV', including dates and a final calculation.
| Identifier | ExFiles\Box 88\2\ scan0104 | |
| Date | 15th May 1935 guessed | |
| 11468 10,000 miles 4BIV 6400 Completed. 2/3/34 23/3/34 13,000 miles 4BIV in FRANCE COMPLETED 12/12/33 4000 Miles 4BIV Completed. 29/6/34 Run 15th Aug on 4BIV 1500 MILES 13000 6400 10000 1500 30,900 4271 35,171 | ||