sentences:  Recognising the lack of teachers in the language, Chesswas took the opportunity to publish a textbook for stations where no teachers of the language were available.Chesswas cites Sir Apolo Kagwa's "Engero z’Abaganda" and Michael B. Nsimbi's "Olulimi Olugand" as his major sources, and acknowledges Nsimbi as his primary aid in developing the text.With Nsimbi, Chesswas went on to produce "An explanation of the Standard Orthography of Luganda"; first written for "The Eagle Press" in 1958, and published as a book in 1963, with second, third and fourth (1985) editions.