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).
Telegram reporting that a chalk test on Bentley pistons revealed cracks, requesting six replacement pistons be sent to Paris.
| Identifier | ExFiles\Box 83\4\ scan0070 | |
| Date | 15th November 1938 | |
| ROYCAR DERBY = ROBOTHAM CHALK TEST OF BENTLEY PISTONS BROUGHT UP CRACKS IN RING LANDS ALL PISTONS AND ONE SKIRT SEND SIX PISTONS TO PARIS = HANCOCK | ||