I want to state the theory in An Experiment with Time as clearly as I can in my own way; then to consider its application to Precognition; and then to consider whether there are any other grounds for accepting it beside its capacity to account for the possibility of Precognition. Mr. Dunne himself holds that the theory is required quite independently of explaining Precognition. He also holds that the facts which demand a serial theory of Time require that the series shall be infinite. Both these contentions might be mistaken, and yet Mr. Dunne might be right to the extent that it is necessary to assume a series of at least two terms for the special purpose of explaining Precognition.