Samuel Horsley was a British churchman, bishop of Rochester from 1793. He was also well versed in physics and mathematics, on which he wrote a number of papers and thus was elected a Fellow of the Royal Society in 1767; and secretary in 1773, but, in consequence of a difference with the president he withdrew in 1784.

William Stuart PC was an Anglican prelate who served as the Bishop of St David's in Wales from 1794 to 1800 and then Archbishop of Armagh in Ireland from 1800 until his death.