This was opposed by the Puritan dominated town council. A house facing Bath Street from the Abingdon School grounds is named 'Heylyns' in commemoration. At the Restoration, he left Abingdon and was made sub-Dean of Westminster, but poor health prevented further advancement. He married Letitia Highgate and had a large family. His monument is in Westminster Abbey. He was a prolific writer, and a keen and acrimonious controversialist against the Puritans. Among his works are a "History of the Reformation of the Church of England", and a Life of Archbishop William Laud ("Cyprianus Anglicanus") (1668). He affixed Greek titles to two of his books, "Κειμήλια Ἐκκλησιαστικά: Historical and miscellaneous tracts" (1662) and "Ἡρωολογία Anglorum; or, a help to English history" (1641). He was the writer of the "Cosmographie", an attempt to describe in meticulous detail every aspect of the known world in 1652, the geography, climate, customs, achievements, politics, and belief systems. It appears to have been the first description in print of Australia, and perhaps of California, Terra del Fuego, and other territories in the New World. He objected to the name "America" as it placed undue glory on Amerigo Vespucci, and recommended "Columbana" or "Cabotia" as more indicative of the true discoverers, Columbus and Cabot. Heylyn's publications include:  and the very, very rare: