He entered Magdalene College, Cambridge, on 2 June 1631, but two months later migrated to Peterhouse, Cambridge, where he was admitted a sizar on 9 Aug., and where he was a fellow student with Richard Crashaw and Joseph Beaumont, afterwards master of the college.
In 1642 he was officiating at York as an army chaplain under Sir Thomas Glemham, and about this time he married a Miss Eland of Bedale.
[2] A committed Royalist, after many years as a military chaplain he became the incumbent at Knaresborough in 1660.
Subsequently, for at least five years (1650–5), during the interregnum, he publicly preached at St. Peter's, Paul's Wharf, London, where, notwithstanding the prohibition of the law, he used the Book of Common Prayer, and administered the holy communion monthly.
He died at Derry on 21 December 1679:[4] his grandson, Robert Mossom was Professor of Divinity at Trinity College, Dublin and Dean of Ossory from 1703 until 1747.