Drawing No. LeC.858 which shows spring diagrams for a shorter valve spring to suit stronger washers.
| Identifier | WestWitteringFiles\A\September1917\ Scan0 | |
| Date | 4th September 1917 | |
| To By. {R.W. Bailey - Chief Engineer} [struck through] from E. {Mr Elliott - Chief Engineer} ORIGINAL St. {Capt. P. R. Strong} Margaret's Bay. 2 c. to Ck. {Mr Clark} Sept. 4th. 1917. X2925/P. Re - Shorter Valve Spring to suit stronger washers. E3/W4917. Please find attached drawing No. LeC.858 showing spring diagrams for the above. E. {Mr Elliott - Chief Engineer} | ||
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).