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).
Sketch on graph paper showing a worn engine fabric coupling with elongated holes and a bulged shape.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan018 | |
| Date | 1st January 1929 guessed | |
| XX ENGINE FABRIC COUPLING HOLES ELONGATED AND COUPLING BULGED | ||