 In November, 1542, Kennedy, in his late twenties at the time, was taken prisoner at the Battle of Solway Moss, and after a short stint in the Tower of London, was placed under the care of Thomas Cranmer, Archbishop of Canterbury.Scottish historian Gilbert Burnet (1643-1715) believed that it was this relationship with Cranmer that led Kennedy toward Protestantism, as certainly he was one of the first of the Scottish nobility to adopt Reformed views.However, since his time with Cranmer lasted only one month, it is likely that his earlier contact with Buchanan had been a stronger influence in this regard.