4. Northolt: November 21–December 15, 1917
- R.F.C. Training Squadron #2 Northolt, Eng., November 21, 1917 A. M.
- Northolt Aerodrome, November 22, 1917
- Royal Flying Corps, Ruislip, Middlesex., November 23, 1917
- Royal Flying Corps, Ruislip, Middlesex., [(Saturday) November 24, 1917]
- Northolt Aerodrome, Nov. 26, 1917
- Northolt Aerodome, Nov. 27, 1917
- Northolt Aerodrome, Nov. 29, 1917.
- Northolt Aerodrome, November 30, 1917
- Royal Flying Corps, Ruislip, Middlesex., [December 3, 1917]
- Royal Flying Corps, Ruislip, Middlesex., December 4, 1917
- From Parr’s Pilot’s Flying Log Book
- [#11] Royal Flying Corps, Ruislip, Middlesex. Northolt Aerodrome, Dec. 6, 1917
- [#12] No. 56 Training Squadron, Royal Flying Corps. London Colney Aerodrome, December 10, 1917
- #13 Royal Flying Corps, Ruislip, Middlesex., December 13, 1917
- #14 Royal Flying Corps, Ruislip, Middlesex., December 15, 1917
- Photos and illustrations for chapter 4