Complex sentence: After continuing practice for some 22 years Dalton semi-retired in 1979 moving to the town of Allora located in the Darling Downs, he later returned to Toowong to continue working in practice on a part time basis.
Split into simpler sentences: After continuing practice for many years Dalton retired in 1979 moving to the town of Allora located in the Darling Downs. He returned later to Toowong to continue working in practice on a part time basis.