I have often noticed that these things, which obsess me, neither bother nor impress other people even slightly. I am horribly apt to approach some innocent at a gathering, and like the ancient mariner, fix him with a wild, glitt’ring eye and say, “Do you know that in the head of the caterpillar of the ordinary goat moth there are two hundred twenty-eight separate muscles?” The poor wretch flees. I am not making chatter; I mean to change his life.