Photographs taken from negatives created by Peter Pearce and B. R. Billings. They appear to have been in the possession of SPAB at the time of Stephen developing them. Peter Pearce's photographs of predominantly Sussex, with some in Essex, Oxfordshire, Buckinghamshire and Surrey, taken between 1925 and 1936. B. R. Billings' photographs were taken between 1913 and 1920.

Photographs by a Mr Francis of English windmills from the period 1929-30.

Small, blue, ring-bound notebook labelled "Earliest Windmill Notes 1949 Essex, Sussex, Kent". Contains notes and sketches on windmills including Ash Mill; Little Laver; Moreton; Henham; Stansted; Thaxted; Wimbledon Common; Clavering; White Roding; High Ongar; Littlehampton; Rolvenden; Rye; Northiam; Playden; Sissinghurst; High Halden; Great Chart; Sandhurst; Kennington; Chillenden; Stanford; Pluckley; Wittersham; Smarden; Blackmore End; Beneden; Cross in Hand; Punnett's Town; Biddenden; Woodchurch.