H.21: Blackwell, C.M. Blackwell was appointed to a two-year postdoctoral post in Abraham's laboratory in 1977. Correspondence concerns appointment only. Includes recommendations.

H.22-H.29: Bleaney, R.C. Bleaney was a postdoctoral organic chemist appointed to research in Abraham's laboratory on the synthesis of compounds related to penicillins and cephalosporins. Correspondence and papers regarding career, appointments, and research. Includes references and recommendations. 1974-1978

H.30: Brannan, S. Brannan was appointed to a two-year postdoctoral post in Abraham's laboratory, 1977. Correspondence concerns appointment only. Includes references and recommendations.

H.31-H.37: Brightwell, M. Brightwell came to Abraham's laboratory as a research assistant in 1972 to work on the structure and function of members of the penicillinase group of enzymes. Correspondence and papers regarding career, appointments, and research. Includes recommendations. 1972-1975.