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).
The relocation of the car horns to under the bonnet.
| Identifier | ExFiles\Box 166\9\ img069 | |
| Date | 6th April 1937 guessed | |
| -2- by removing the horns from the outside of the car entirely and mounting the same under the bonnet. RM{William Robotham - Chief Engineer}/wst. | ||