“Thinking,” says the behaviorist,--and I now quote from David Wechsler, “Psychology as a Practical Science in Modern Life,”[27]--“thinking is but a sub-vocal speech--that is, it consists of certain muscular movements of the throat and chest [like those observed in a semi-literate man when he is attempting to read to himself] which are not accompanied by the production of sounds.” _Id est_, they are not _always_ accompanied by sounds, and some of them are observable only by means of instruments. The child, we are told, begins by doing all his thinking aloud--but some of us eventually learn to do it without noise. Prof. Wechsler adds that the muscular theory of thinking is “not as far-fetched as it seems.” Why is it not? Because these sub-vocal movements seem always to be going on when we are thinking, and to some minds--or should I say muscles?--it seems logical to say that an accompaniment or a consequence is a cause. The same sort of sub-vocal speech will lead us to conclude that the foam in the wake of a steamer is what causes the vessel to go. I have often noticed that a little troupe of dogs usually accompanies Mrs. Belfeather in her walks in the park. I now learn that these dogs _are_ Mrs. Belfeather. That great psychologist, Eric Peters, once said to Chlorine Garnet, “I uses my eyes to see with an’ my brains to think thoughts.”[28] Evidently Peters is not a behaviorist. Neither was Shenute, who died in the year 451, famous for his anti-pagan propaganda among the Copts of Egypt. But he seems to have had some of our moderns in mind, for he said: “They also make the sound of birds, having filled books, for themselves and you, with vain words: Tinks! Tinks! Kwaks! Kwaks! saying: We are making the sound of birds.” “What possible good does it do,” demands Dr. Watson,[29] “when discussing brick-laying or sub-vocal arithmetic to guess at what goes on in the synapse, in the efferent or afferent leg of the reflex arc, or in the muscle itself?” Such problems, he adds, “belong to the realm of physiology, and this section of physiology has not yet been written.”