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).
On a Post Office Telegraph form regarding modifications to a worm wheel, servo, and braking system.
| Identifier | ExFiles\Box 6\4\ 04-page128 | |
| Date | 14th May 1925 | |
| 3) Replaced lubricated felt hollow worm wheel increased length of worm and made servo do less work by increasing angle or diameter of cams also good to reduce front braking because its effect on steering Royce. | ||