 He was also at one point ambassador of Sierra Leone to Norway, Sweden, and Denmark.He was President of the United Nations Security Council in September 1970.He maintained a home for many years in Thornton Road, Cambridge, England, frequently visiting Christ's College, of which he had been made a distinguished Honorary Fellow, meanwhile serving from 1987 until retiring in 1991 as a visiting professor of International Studies at the University of California (1987–88) and University of South Carolina (1990–91).