“As we step out of the house on a fine evening between four and six, we shed the self our friends know us by and become part of that vast republican army of anonymous trampers, whose society is so agreeable after the solitude of one’s room. . . . Into each of these lives one could penetrate a little way, far enough to give one the illusion that one is not tethered to a single mind, but can put on briefly for a few minutes the bodies and minds of others.”