His life consisted of one chemical change after another, haphazardly provoked in some three pounds of fibrous matter tucked inside his skull. And so, people's heads took on a new interest; how was one to guess what was going on in those queer round boxes, inset with eyes, as people so glibly called certain restive and glinting things that moved in partial independence of their setting, and seemed to have an individual vitality—those queer round boxes whence vegetation sprouted as from the soil of a planet?
Perhaps—he mused—perhaps in reality all heads were like isolated planets, with impassable space between each and its nearest neighbor. You read in the newspapers every once in a while that, because of one-or-another inexplicable phenomenon, Mars was supposed to be attempting to communicate with the earth; and perhaps it was in just such blurred and unsatisfactory fashion that what happened in one human head was signaled to another, on those rare occasions when the signal was despatched in entire good faith. Yes, a perpetual isolation, for all the fretful and
