Complex sentence: In 1831-32 Dixon carried out surveys in the Upper Hunter and New England districts, and in October 1833 was sent to trace the ranges between the Lachlan River and the Macquarie River.
Split into simpler sentences: In 1831-32 Dixon carried out surveys in the Upper Hunter and New England districts. In October 1833, Dixon was assigned to survey the mountain ranges between the Lachlan River and the Macquarie River.