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 B.40. Engine (75m/m), referencing file 1064.
| Identifier | ExFiles\Box 146\4\ scan0070 | |
| Date | 27th March 1940 | |
| To HPS{Horace Percy Smith - Experimental Factory Mgr} HPS{Horace Percy Smith - Experimental Factory Mgr} | RH{R. Hollingworth} Knagg Wheeler Walker 1246 Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}11/JH. 27.3.40 B.40. Engine (75m/m) see file 1064 | ||