The 1960s satire boom was coming to an end and Cook said: "England was about to sink giggling into the sea." He complained that Frost's success was based on copying Cook's own stage persona and Cook dubbed him "the bubonic plagiarist", and said that his only regret in life, according to Alan Bennett, had been saving Frost from drowning. This incident occurred in the summer of 1963, when the rivalry between the two men was at its height. Cook had realised that Frost's potential drowning would have looked deliberate if he had not been rescued.