His parliamentary career began when he was elected MP for Bossiney, Cornwall, in a by-election in 1581. In 1584 he took his seat in Parliament for Melcombe in Dorset, and in 1586 for Taunton. At this time, he began to write on the condition of parties in the church, as well as on the topic of philosophical reform in the lost tract "Temporis Partus Maximus". Yet he failed to gain a position that he thought would lead him to success. He showed signs of sympathy to Puritanism, attending the sermons of the Puritan chaplain of Gray's Inn and accompanying his mother to the Temple Church to hear Walter Travers. This led to the publication of his earliest surviving tract, which criticized the English church's suppression of the Puritan clergy. In the Parliament of 1586, he openly urged execution for the Catholic Mary, Queen of Scots.