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).
Requesting the fitting of a front expansion box to an exhaust system.
| Identifier | ExFiles\Box 101\4\ scan0141 | |
| Date | 4th December 1935 | |
| To R.H.C. X500a Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager}27/KW.4.12.35. Re 21-G-IV Exhaust System. Will you please fit to the above car a front expansion box of the same dimensions as fitted recently to Wor{Arthur Wormald - General Works Manager}'s car GUB-5, and Sg{Arthur F. Sidgreaves - MD}'s car GLG-5. The rest of the system to remain standard. Hs{Lord Ernest Hives - Chair}/G.H. Whyman. | ||