This section documents a variety of research by Abraham and his colleagues at the Sir William Dunn School of Pathology and by a number of other organisations. The greater part of the material relates to the work on Cephalosporin C and related compounds and the development of marketable cephalosporin antibiotics, though research on penicillin (from 1940), bacilysin and other antibiotics is also covered.

Papers relating to the cephalosporins is dispersed through most of the sub-sections listed below. The correspondence covering the stages of the collaborative research from the late 1940s to the introduction of the first cephalosporin drug in 1964 is chiefly found in the sub-sections 'Medical Research Council', 'National Research Development Corporation' and 'Other Organisations'.