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).
To the Experimental Department regarding the tone of a horn from Clear Hooters Ltd.
| Identifier | ExFiles\Box 59\3\ Scan047 | |
| Date | 29th April 1927 | |
| Hs.{Lord Ernest Hives - Chair} (Experimental Dept.) X1069ROY{Sir Henry Royce}/MS2/P.29.4.27. We attach hereto a copy of a letter dated 27th. received from Clear Hooters Ltd., Birmingham. The Horn referred to is in Repair Dept. Perhaps you will go up and hear the tone of it, and let us have your report. Roy{Sir Henry Royce} RECEIVED AP 29 1927 | ||