A repurposed Lett's diary for 1935 measuring 7.5 cm x 11.5 cm, containing measurements, notes, calculations and drawings on a variety of engineering and milling matters including the windmills itemised at 'Place access points' below. Reference is made to the impact of gales at Winchelsea (which eventually blew down in gales in 1978 and 1987).

Pocket No. 40 of Album No. 2. A Photograph of Union Mill in Whitby, Yorkshire. The photograph shows the mill dominating the skyline from a side angle, positioned behind two buildings with five sails, some being broken. Also shows the fantail at the back of the mill.