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).
Cover page regarding the Packard Type Suspension.
| Identifier | ExFiles\Box 9\5\ 05-page240 | |
| Date | 27th March 1939 | |
| 646. Rm{William Robotham - Chief Engineer} Da{Bernard Day - Chassis Design}/EV{Ivan Evernden - coachwork} I/N. 27.3.39. The Packard Type Suspension file 1305 | ||