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).
Letter confirming the receipt of two charged Edison cells.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page257 | |
| Date | 9th February 1914 | |
| X.50 Villa Rossignol Le CanadelHenry Royce's French residence Par le Lavandou Par France 9/2/14 Mr Mercer Dear Sir I am in receipt of the two Edison cells for which I thank you. They were delivered ready charged for use. I remain Yours respectfully P. Wilson X50 | ||