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).
Blueprint for a gantry crane showing dimensions, driver's cabin, and ladder.
| Identifier | Morton\M7\ img056 | |
| Date | 1st January 1931 | |
| 2'-6", 5'-6", 1 1/2, Gantry Rail Level, Ladder, Driver, Resistances, 12", 5'-9", 10", Nearest Hook Approach, 3'-9", 1S/1.31 | ||