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 the dispatch of stamped test pieces.
| Identifier | ExFiles\Box 37\4\ scan 113 | |
| Date | 30th May 1917 | |
| Mr. Clark. X.3040 30th May 1917. 12 test pieces sent to Mr. Purdon stamped A.{Mr Adams} 9 test pieces stamped. L. X.2746 X.3039 X.3040 (Sgd) A.K. | ||