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).
Two schematic diagrams illustrating alternative manifold connection layouts.
| Identifier | WestWitteringFiles\Q\April1927-June1927\ 109 | |
| Date | 4th June 1927 | |
| E3/M4·6·27 SCHEME 1 SCHEME 2 EACH SCHEME WITH & WITHOUT CENTRAL CONNECTION SHOWN DOTTED CE. | ||