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 discussing issues with battery ignition, spark power, and discharge at the plug points.
| Identifier | WestWitteringFiles\D\October1919\ Scan24 | |
| Date | 29th October 1919 | |
| Royce Derby Clerk re Battery Ignition anything which enfeebles the discharge at the plug points probably reduces the power of spark to fire a weak or irregular charge and at once do all possible to improve ignition to get best discharge | ||