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).
Instruction to fit two 25 HP exhaust manifolds to chassis 20-G-IV and 21-G-IV.
| Identifier | ExFiles\Box 104\2\ scan0110 | |
| Date | 14th September 1934 | |
| To RHC.{R. H. Coverley - Production Engineer} X5230 Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager}6/KW.14.9.34. Re 25 HP. Exhaust Manifold. Will you please instruct for 2 Exhaust Manifolds to LeC.4099, same to be fitted to 20-G-IV and 21-G-IV respectively. Hs{Lord Ernest Hives - Chair}/G.H. Whyman. | ||