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 confirming that the examination of 5000 pistons was completed successfully.
| Identifier | ExFiles\Box 82\1\ scan0291 | |
| Date | 2nd November 1929 | |
| X6113N POST OFFICE TELEGRAPHS. Office Stamp: DERBY 2 NOV 29 * CT 5000 ++ 243 C DLR 1625 29 CHÂTEAUROUX 9 HIVES ROYCAR DERBY = PISTONS EXAMINED 5000 ALL OKAY = HANCOCK ++ | ||