Lack and Barbara Wagstaff (1895-1974[2]) both joined the Royal Photographic Society in 1944 and gained their Associate the same year.

They are reported as amongst the teaching staff of Putney High School 1935-6, which would fit with Lack's London photography series of the 1930s.

[13] In 2010, a collection of around 400 prints of the pair's photographs of Sutton Hoo were found to have been donated to the National Trust a few years before by Lack's great-nephew.

[citation needed] Lack was given a collection of ship rivets by Charles Phillips on the last day of the 1939 excavation.

[16] Lack and Wagstaff provided much of the visual material - still and moving image - for a BBC documentary The Million Pound Grave broadcast on 17 August 1965.