sentences:  He was a pioneer in the development of Luganda language orthography, held a high post in the colonial government of the day, and worked as a leading educational evaluation theorist for programmes in the developing world.Chesswas is the author of "The Essentials of Luganda (1954)"; the third (1963) and fourth (1967) editions of which are commonly used as a textbook for courses in Luganda language.Chesswas was employed by the Luganda Language Board as a teacher of Luganda when, in 1949, the Government for the Uganda Protectorate began to offer free courses in Luganda to any officer wishing to take up the study.