The papers of John Turner MacGregor-Morris mainly relate to his work as Head of the Electrical Engineering Department at East London College (later Queen Mary College). This includes correspondence and other papers relating to departmental administration, students, research undertaken in the department (particularly on the subjects of cathode ray oscillography and high voltage engineering) and the high voltage laboratory.
There is also material relating to Albert Peter Thurston and the work of the Aeronautical Engineering department including published articles by or about Thurston and the history of the department, and research notes testing different models of aircraft.
There is also material relating to various College clubs and societies including papers concerning the establishment of the Union Society, papers from the college Engineering Societies and memorabilia from talks, concerts and dinners.