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).
Confirming the receipt of four Bleriot Phi cut-outs for trial.
| Identifier | ExFiles\Box 48\3\ Scan227 | |
| Date | 31th March 1921 | |
| X.4215 31.3.21. X.4215 - BLERIOT PHI CUTOUTS. We have to-day received four Bleriot Phi cut-outs for further trial. EFC. {E. Fowler Clarke - Electrical Engineer} | ||