 He found, however, that "after a few weeks of serious argument the 'if' was becoming less and less improbable", and Greene finally was converted and baptised after vigorous arguments initially with the priest in which he defended atheism, or at least the "if" of agnosticism.Late in life, however, Greene took to calling himself a "Catholic agnostic".Beginning in 1946, Greene had an affair with Catherine Walston, the wife of Harry Walston, a wealthy farmer and future life peer.