Papers covering Hey's career, 1930-1971, including scientific papers, lectures, notes relating to departmental administration, and papers by others. File of correspondence, 1936-1937, chiefly with Professor William Alexander Waters, Professor of Chemistry at the University of Durham, relating to Waters' investigations into reactions involving free radicals and the subsequent publication of a paper on the same in Chemical Review , and including a draft and final version of Waters' paper on 'Decomposition reactions of the Aromatic Diazo Compounds', read to the Royal Society of Chemistry in Dec 1936.