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).
Procedure for making private telephone calls.
| Identifier | ExFiles\Box 143\3\ scan0088 | |
| Date | 20th January 1940 | |
| 1204. To D.{John DeLooze - Company Secretary} Rm.{William Robotham - Chief Engineer}4/JH.20.1.40. PRIVATE CALLS. Replying to D/DL.15.1.40. It is understand in this department that anyone wishing to use the telephone for private purposes should notify the operator. Rm.{William Robotham - Chief Engineer} | ||