Books found in Grace Kemp's room: The Rational Mind - Murray Peter's, Biochemistry And The Central Neverous System - McIlwain And Bachelard Fourth Edition Churchill Livingstone.
While the characters keep referring to Tanganyika as though it is a sovereign state, at the time the series is set, Tanganyika was an United Nations Trust Territory under British rule. Which it remained from 1946-1961.