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).
Note directing to a file regarding the Phantom Condenser for further correspondence.
| Identifier | ExFiles\Box 34\1\ Scan330 | |
| Date | 6th July 1923 guessed | |
| X.2512. For further correspondence see file X.8700 - Phantom Condenser. EFC. | ||