Complex sentence: Farrer's final voyage was to the mountains of Upper Burma, taking as his companion E.H.M Cox, who recorded the trip in' Farrer's Last Journey, Upper Burma 1919-20' (1926).
Split into simpler sentences: Farrer's final voyage was to the mountains of Upper Burma. He took as his companion E.H.M Cox, who recorded the trip in' Farrer's Last Journey, Upper Burma 1919-20' (1926).