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).
Short typed communication to Halford regarding a discussion about silent tappets.
| Identifier | ExFiles\Box 17\6\ Scan192 | |
| Date | 20th April 1934 | |
| X7060 20.4.34. HALFORD, Gerrard 1217, LONDON. GLAD TO TALK SILENT TAPPETS WITH YOU MONDAY MORNING. ROYCAR, | ||