I doubt if among the lower forms of animals play holds any such prominent place as with the dog and the keen-witted, intelligent otter. To catch these lower animals at play is a rare experience. One of our naturalists describes the game of “follow my leader,” as he watched it played by a school of minnows--a most unusual record, but not at all hard to believe, for I saw recently, from the bridge in the Boston Public Garden, a school of goldfish playing at something very much like it. This naturalist was lying stretched out upon an old bridge, watching the minnows through a large crack between the planks, when he saw one leap out of the water over a small twig floating at the surface. Instantly another minnow broke the water and flipped over the twig, followed by another and another, the whole school, as so many sheep, or so many children, following the leader over the twig. The love of play seems to be one of the elemental needs of all life above the plants, and the games of us human children seem to have been played before the dry land was, when there were only water babies in the world, for certainly the fish never learned “follow my leader” from us. Nor did my young bees learn from us their game of “prisoners’ base” which they play almost every summer noontime in front of the hives. And what is the game the flies play about the cord of the drop-light in the centre of the kitchen ceiling? One of the most interesting animal games that I ever saw was played by a flock of butterflies on the very top of Mount Hood, whose pointed snow-piled peak looks down from the clouds over the whole vast State of Oregon. Mount Hood is an ancient volcano, eleven thousand two hundred twenty-five feet high. Some seven thousand feet or more up, we came to “Tie-up Rock”--the place on the climb where the glacier snows lay before us and we were tied up to one another and all of us fastened by rope to the guide. From this point to the peak, it was sheer deep snow. For the last eighteen hundred feet we clung to a rope that was anchored on the edge of the crater at the summit, and cut our steps as we climbed. Once we had gained the peak, we lay down behind a pile of sulphurous rock, out of the way of the cutting wind, and watched the steam float up from the crater, with the widest world in view that I ever turned my eyes upon. The draft pulled hard about the openings among the rock-piles, but hardest up a flue, or chimney, that was left in the edge of the crater-rim where parts of the rock had fallen away.