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).
List of front & rear engine supports and mountings for various models with associated numerical values.
| Identifier | ExFiles\Box 125\2\ scan0119 | |
| Date | 12th April 1937 | |
| -2- 12.4.37. P - 4 front & rear engine supports & mountings 10 1/2 D -5 " 10 1/2 C - 7 " 10 1/2 S - 2 " 8 7/8 C - 8 " 11 3/4 C - 9 " 12 -------- | ||