Complex sentence: Working initially on Mark and John and then on a handbook of Lisu history and language, Fraser handed on the translation task to Allyn Cooke and his wife, Leila, coming back to help the team with revision and checking in the mid- 1930s.
Split into simpler sentences: Working initially on Mark and John and then on a handbook of Lisu history and language, Fraser handed on the translation task to Allyn Cooke and his wife, Leila. He came back to help the team with revision and checking in the mid- 1930s.