The researches so commenced, and his own particular interest in the hyphomycetes, were continued by Ingold and his students over many years. In 1944 he was appointed to probably the foremost chair in United Kingdom in the field of mycology, at Birkbeck College, University of London. The Department of Botany had been led to prominence since 1909 by Dame Helen Gwynne-Vaughan, pioneer in fungal genetics, who was made Professor in 1921. Following her retirement as Professor Emeritus Ingold first had the task of maintaining its work in the bomb-damaged premises at Fetter Lane during the last months of the War. After the cessation of hostilities he was able to oversee its redevelopment and subsequent move in 1952 to the new Birkbeck College in Malet Street.
