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 inquiring about the failure mode of Smith versus Lucas electrical machines when a circuit fault occurs.
| Identifier | WestWitteringFiles\E\August1920\ Scan47 | |
| Date | 24th August 1920 | |
| Roycear Derby Clark should a fuse blow or any disconnection occur on any of the circuits does the Smith machine roast and Lucas not roast Royce | ||