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).
List of three new types of interleaving material currently on order.
| Identifier | ExFiles\Box 154a\4\ scan0123 | |
| Date | 22th January 1940 | |
| -2- Rm {William Robotham - Chief Engineer} /Clm. {D. D. Clapham} 2/JH.22.1.40. (c) We have on order three new types of interleaving - 1. Spaldite with reinforced tips of Tufnol as decided upon when Mr. Spittlehouse came over from Woodhead. 2. Graphite impregnated Tufnol. 3. Ferodo V.G. 90 type of material. Rm {William Robotham - Chief Engineer} /Clm. {D. D. Clapham} | ||