Complex sentence: A commited Royalist after many years as a military chaplain he became the incumbent at Knaresborough in 1660 after which he was Precentor at Christ Church, Dublin until his elevation to the Episcopate.
Split into simpler sentences: A commited Royalist, after many years as a military chaplain he became the incumbent at Knaresborough in 1660. After that he was Precentor at Christ Church, Dublin until his elevation to the Episcopate.