  Findlay’s paper ‘Time: A Treatment of Some Puzzles’ had appeared in the Australasian Journal of Psychology and Philosophy in 1941. Prior became aware of it as a result of its appearance in Flew’s 1951 collection Essays on Logic and Language, which arrived in New Zealand just as Prior was writing the final chapters of The Craft. The suggestion Prior referred to is barely more than a passing comment: ‘[O]ur conventions with regard to tenses are so well worked out that we have practically the materials in them for a formal calculus’, wrote Findlay. He continued in a footnote: