II
You ought to go out upon some mowing hill or field of stubble and hear the crickets, then into the apple orchard and hear the katydids, then into the high grass and bushes along the fence and hear the whole stringed chorus of green grasshoppers, katydids, and crickets. You have heard them all your life; but the trouble is that, because you have heard them so constantly in the autumn, and because one player after another has come gradually into the orchestra, you have taken them as part of the natural course of things and have never really heard them individually, to know what parts they play. Now anybody can hear a lion roar, or a mule bray, or a loon laugh his wild crazy laugh over a silent mountain lake, and know what sound it is; but who can hear a cricket out of doors, or a grasshopper, and know which is which?