Of all living things on earth, a tree binds us most closely to the past. Some of the giant tortoises of the Galapagos Islands are thought to be four hundred years old and are probably the oldest animals on the earth. There is, however, nothing to compare with the majesty and grandeur of the Sequoias--the giant redwoods of California--the largest of which, still living, reach upward more than one hundred yards above the ground, and show, by the number of their rings, that their life began from three to five thousand years ago. Our deepest feelings of reverence are aroused when we look at a tree which was "one thousand years old when Homer wrote the Iliad; fifteen hundred years of age when Aristotle was foreshadowing his evolution theory and writing his history of animals; two thousand years of age when Christ walked upon earth; nearly four thousand years of age when the 'Origin of Species' was written. Thus the life of one of these trees spanned the whole period before the birth of Aristotle (384 B.C.) and after the death of Darwin (A.D. 1882), the two greatest natural philosophers who have lived." Considered not only individually, but taken as a group, the Sequoias are among the oldest of the old. Geologically speaking, most of the forms of life now in existence are of recent origin, but a full ten million of years ago these giant trees were developed almost as highly as they are to-day. At the end of the coal period, when the birds and mammals of to-day were as yet unevolved, existing only potentially in the scaly, reptile-like creatures of those days, the Sequoias waved their needles high in air. In those days these great trees were found over the whole of Canada, Greenland, and Siberia, but the relentless onslaught of the Ice Age wrought terrible destruction and, like the giant tortoises among reptiles, the apteryx among birds, and the bison among mammals, the forlorn hope of the great redwoods, making a last stand in a few small groves of California, awaits total extinction at the hands of the most terrible of Nature's enemies--man. When the last venerable giant trunk has fallen, the last axe-stroke which severs the circle of vital sap will cut the only thread of individual life which joins in time the beating of our pulses to-day with the beginning of human history and philosophy,--thousands of years in the past.