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 weights for various Phantom III inlet and exhaust valves.
| Identifier | ExFiles\Box 96\2\ scan0066 | |
| Date | 27th September 1935 | |
| To E.{Mr Elliott - Chief Engineer} x354 Hs{Lord Ernest Hives - Chair}/Smth.6/KW.27.9.35. PHANTOM III VALVES. Replying to E.2/HP.26.9.35, the weights of various Ph.III valves are Inlet. E.{Mr Elliott - Chief Engineer} 84828 .161 lbs. E.{Mr Elliott - Chief Engineer} 86288 .141 lbs. Exhaust E.{Mr Elliott - Chief Engineer} 84829 .188 lbs. E.{Mr Elliott - Chief Engineer} 86289 .159 lbs. E.{Mr Elliott - Chief Engineer} 87424 .181 lbs. Hs{Lord Ernest Hives - Chair}/F.Ll.Smith. | ||