[1] He was so highly esteemed by the Earl of Eglintoun that, though appointed to the chair of divinity at Glasgow in 1661, he never left Kilwinning to enter on that office.
He was a man of eminent piety, and at the same time "much admired", as a writer of his life in Wodrow's Analecta says, "for his great and singular wisdom and prudence, being reckoned one of the wisest men in a nation, most fit to be a counsellor to any monarch in Europe".
[1] In the controversy between the resolutioners and protesters he adopted the side of the former, but it is recorded that he confessed before his death that he was wrong.
[1] Ferguson is remembered and esteemed at this day as the author of a series of excellent commentaries on St. Paul's Epistles.
He married Jean Inglis (d. 1687), by whom he had two sons, James and Hew, and a daughter, Mary, wife of Robert Cheislie, an Edinburgh merchant.