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 required modifications for various components on page 2.
| Identifier | ExFiles\Box 168\3\ img110 | |
| Date | 11th March 1939 | |
| -2- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/MH.{M. Huckerby}11.3.39. (11) New rocker cover to be fitted, existing is obsolete having breather hole. (12) Hot spot water return pipe has no tab for fixing. (13) Locking of external nuts to be carried out as per T.P. sheet. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||