Complex sentence: Three years later he supported Bishop Richard Watson in his controversy with Gilbert Wakefield; and in 1811 he attempted to undermine a Whig watchword in "An Enquiry into the Supposed Increase of the Influence of the Crown".
Split into simpler sentences: Three years later he supported Bishop Richard Watson in his controversy with Gilbert Wakefield. In 1811 he attempted to undermine a Whig watchword in "An Enquiry into the Supposed Increase of the Influence of the Crown".