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).
Invoice from AC-Sphinx Sparking Plug Co. for De-Frosters that were supplied without an official order.
| Identifier | ExFiles\Box 137\3\ scan0007 | |
| Date | 6th January 1939 | |
| File Heating h/o Rly/sm 1158 Rm{William Robotham - Chief Engineer}/Std. G/WFH/CA.37/BB.6.1.39 We have an invoice from The AC-Sphinx Sparking Plug Co., Ltd., dated 23.12.38 charing us 10/6d each less 50% for 3. No.1571098 De-Frosters for which they apparently have not had an official order. If these De-Frosters may be paid for, will you kindly give Roy.{Sir Henry Royce} instructions for covering order to be issued. G/WFH. | ||