about into places it has no right to be. Long before the school of materialistic monism arose, the ground was removed so that there could be no foundation. Locke was the man, John Locke. Two hundred years ago — more than that, even in his ‘Essay concerning the Human Understanding,’ he proved the non-existence of innate ideas. The best of it is that that is precisely what you claim. To-night, again and again, you have asserted the non-existence of innate ideas.

“And what does that mean? It means that you can never know ultimate reality. Your brains are empty when you are born. Appearances, or phenomena, are all the content your minds can receive from your five senses. Then noumena, which are not in your minds when you are born, have no way of getting in — “

“I deny — “ Kreis started to interrupt.

“You wait till I’m done,” Norton shouted. “You can know only that much of the play and interplay of force and matter as impinges in one way or another on our senses. You see, I am willing to admit, for the sake of the argument, that matter exists; and what I am about to do is to efface you by your own argument. I can’t do it any other way, for you are both congenitally unable to understand a philosophic abstraction.”

“And now, what do you know of matter, according to your own positive science? You know it only by its phenomena, its appearances. You are aware only of its changes, or of such changes in it as cause changes in your consciousness. Positive science deals only with phenomena, yet you are foolish enough to strive to be ontologists and to deal with noumena. Yet, by the very definition of positive science, science is concerned only with appearances. As somebody has said, phenomenal knowledge cannot transcend phenomena.”

“You cannot answer Berkeley, even if you have annihilated Kant, and yet, perforce, you assume that Berkeley is wrong when you affirm that science proves the non-existence of God, or, as much to the point, the existence of matter. — You know I granted the reality of matter only in order to make myself intelligible to your understanding. Be positive scientists, if you please; but ontology has no place in positive science, so leave it alone. Spencer is right in his agnosticism, but if Spencer — “

But it was time to catch the last ferry-boat for Oakland, and Brissenden and Martin slipped out, leaving Norton still talking and Kreis and Hamilton waiting to pounce on him like a pair of hounds as soon as he finished.

“You have given me a glimpse of fairyland,” Martin said on the ferry-boat. “It makes life worth while to meet people like that. My mind is all worked up. I never appreciated idealism before. Yet I can’t accept it. I know that I shall always be a realist. I am so made, I guess. But I’d like to have made a reply to Kreis and Hamilton, and I think I’d have had a word or two for Norton. I didn’t see that Spencer was damaged any. I’m as excited as a child on its first visit to the circus. I see I must read up some more. I’m going to get hold of Saleeby. I still think Spencer is unassailable, and next time I’m going to take a hand myself.”

But Brissenden, breathing painfully, had dropped off to sleep, his chin buried in a scarf and resting on his sunken chest, his body wrapped in the long overcoat and shaking to the vibration of the propellers.