 in 1607, was chosen fellow in 1609.From philosophy he now turned to medicine; got some practical knowledge under the roof of a friend, a physician in Kent, 'very famous for his practice'; and studied astrology, then valued as a handmaid to therapeutics.About 1611, the year in which he commenced MA, he heard a sermon at St Mary's from John Cotton, then fellow of Emmanuel, which opened to him a new career.