Folder A.11.1: Foreign engagements pending 1950-1957. Miscellaneous invitations to lecture, mostly declined or deferred. Includes: folder of correspondence 1953-1956 regarding proposed symposium on The Resonance Controversy (with L. Pauling and D. Sokolov as contributors) and Coulson's intended contribution 'Marxist and Western accounts of resonance'.

Folder A.11.2: Possible future visits to U.S.A. Invitations 1959-1969. Miscellaneous invitations to give scientific and religious lectures, mostly declined or deferred.

Folder A.11.3: Trieste Winter College, 10-16 January 1972. Includes: correspondence with colleagues and organisers regarding lectures at the International Centre for Theoretical Physics, Trieste.

Folder A.11.4: Visit to U.S.A., 1972. Includes: correspondence regarding address given by Coulson at the Robert A. Welch Foundation, Houston, Texas, and other visits, also lectures at General Electric.

Folder A.11.5: Visit to Israel, January 1973. Includes: correspondence, travel schedule, conference programmes, report by Coulson to Royal Society on visits 31 December 1972 - 14 January 1973; to Farkash Symposium, Jerusalem; Tel-Aviv and Negev Universities; Technion, Haifa; Weizmann Institute, Rehovot.

Folder A.11.6: Correspondence regarding Coulson's last engagements 1972-1974.