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 layout plan for the Spectre side steering tube and connections.
| Identifier | ExFiles\Box 95\1\ scan0132 | |
| Date | 30th May 1934 | |
| 446A/ 350 To Hy.{Tom Haldenby - Plant Engineer} from Da.{Bernard Day - Chassis Design} c Wer, E, Hs.{Lord Ernest Hives - Chair} Hdy.{William Hardy} RHC.{R. H. Coverley - Production Engineer} Da.{Bernard Day - Chassis Design}4/HP.30.5.34. SpectreCodename for Phantom III - Side Steering Tube. Herewith is N. Sch.4062, layout in plan of the side steering tube and steering connections. Da.{Bernard Day - Chassis Design} | ||