MSS. Coulson 140-157 contain general scientific and personal correspondence.

MSS. Coulson 158-161: while the general content of these folders is similar to that in Coulson's earlier scientific correspondence (research problems, publications, arrangements for visiting scholars, staff, appointments, etc.) they refer specifically to the new Department of Theoretical Chemistry which Coulson was instrumental in creating at Oxford and whose Chair now bears his name. The folders reflect his efforts to build up a thriving research team as rapidly as possible, and contain a larger element of personal information as he became progressively more unwell.

MS. Coulson 161 is particularly interesting in this respect, as much of the correspondence covers the last months of his life, and was continued by Miss R. Schwerdt after his death in January 1974. Coulson's solicitude for the academic and personal welfare of his students and for the continuation of his department is clear and touching, as is the sense of shock and personal loss widely felt at his death.