He was born at Paulerspury, Northamptonshire. He was educated at Merchant Taylors' School and St John's College, Oxford, where he was a scholar in 1655; he became a Fellow in 1658, and graduated M.A. in 1662.Concise Dictionary of National BiographyMordechai Feingold, Oriental Studies, p. 491 in Trevor Henry Aston, Nicholas Tyacke (editors), The History of the University of Oxford: Volume IV: Seventeenth-Century Oxford(1984).
He began to teach astronomy as deputy to Christopher Wren, then Savilian professor. This was from 1669, the year in which Wren became Surveyor-General of the King's Works. Eventually Wren was too busy, and resigned the chair.