in no sense a signal

Now no surviving human being saw so much of the Martians in action as I did. I take no credit to myself for an accident, but the fact is so. And I assert that I watched them closely time after time, and that I have seen four, five, and (once) six of them sluggishly performing the most elaborately complicated operations together without either sound or gesture. Their peculiar hooting invariably preceded feeding; it had no modulation, and was, I believe, in no sense a signal, but merely the expiration of air preparatory to the suctional operation. I have a certain claim to at least an elementary knowledge of psychology, and in this matter I am convinced--as firmly as I am convinced of anything--that the Martians interchanged thoughts without any physical intermediation. And I have been convinced of this in spite of strong preconceptions. Before the Martian invasion, as an occasional reader here or there may remember, I had written with some little vehemence against the telepathic theory. The Martians wore no clothing. Their conceptions of ornament and decorum were necessarily different from ours; and not only were they evidently much less sensible of changes of temperature than we are, but changes of pressure do not seem to have affected their health at all seriously. Yet though they wore no clothing, it was in the other artificial additions to their bodily resources that their great superiority over man lay. We men, with our bicycles and road-skates, our Lilienthal soaring-machines, our guns and sticks and so forth, are just in the beginning of the evolution that the Martians have worked out. They have become practically mere brains, wearing different bodies according to their needs just as men wear suits of clothes and take a bicycle in a hurry or an umbrella in the wet.