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).
To Mr. Clark regarding tensile and Upton Lewis test pieces sent to Mr. Purdon.
| Identifier | ExFiles\Box 36\3\ scan 088 | |
| Date | 25th May 1917 | |
| Mr. Clark. X.3039 25.5.17. Please note. 6 tensile test pieces sent to Mr. Purdon stamped M 2 ro{C. C. Rose - Export Manager} replace 6 spoilt in machining and testing. 6 tensile test pieces& 3 Upton Lewis test pieces. sent to Mr. Purdon stamped C. X.2746 X.3039 X.3040 (Sgd) A.K. | ||