Complex sentence: He was a conspicuous critic of Governor Gawler's spending policy and abandoned business with the subsequent financial setbacks of 1841--1842 in which he lost a considerable part of his fortune.
Split into simpler sentences: He was a conspicuous critic of Governor Gawler's spending policy. He abandoned his business with the subsequent financial setbacks of 1841--1842 in which he lost a considerable part of his fortune.