In 1866 he was Whitehall preacher, and in 1871 he became canon of St Paul's.
As a preacher he was in great request, though possessing but few of the qualities of the popular preacher.
At twenty-two he was the most popular preacher of his day.
His preaching, his catechizing of the children after evensong, and his connexion with the Bala Methodists - his wife's stepfather being a Methodist preacher - gave great offence.
In 1772 he was appointed by Wesley "general assistant" in charge of the work in America, and although superseded by an older preacher, Thomas Rankin (1738-1810), in 1773, he remained practically in control.