Complex sentence: In 1698, having been appointed to the first Commission of the Treasury, he was also one of the regency in the King's absence: the next year he was made Auditor of the Exchequer, and the year after created Baron Halifax.
Split into simpler sentences: In 1698, having been appointed to the first Commission of the Treasury, he was also one of the regency in the King's absence. The next year he was made Auditor of the Exchequer, and the year after created Baron Halifax.