The big Washington monographs and folios have made a gallery of underground pictures of one of the greatest continents, and these are supplemented by the work of the Canadian geologists. America shows Appalachian folds and thrusts, fault blocks of the Utah plateaus, and eruptives of the Rockies. It contains the amazing metamorphism of very recently upheaved sea beds along the Pacific shore. It records the remnant sea bottoms and dust-storm deposits of the vast plains, bearing beside the obvious buffalo skulls, the old bones of whales, reptiles, and rhinos. Superposed on all this is so-called physiography, the science of falling materials and water, the rotting of the lands, and the accumulation of debris. A net of rivers over ground and under ground is what stands out, and the living river pattern has changed incessantly through the ages. But through and over it is a moving process of the ages, kinetic, alive with glaciers, hot springs, underground heat or surface cold, soaking rains and rushing storms, earthquake and uplift, fault motions and sinkings. Everything is in motion to one who senses slow motion, occasionally breaking down resistance and charging ahead. And geology is a sense of slow motion and its jumps for 5 million years, with this human year, here and now, of great importance. Geology, like humanity, is not just history. Under all are gas and heat; Saratoga Springs, Yellowstone, the Comstock Lode, and Mount Shasta. The series gets hotter from New York to California. And out at sea the refuse of the continent is dumping all day long. And science is anxiously waiting to learn how hot sea bottom is. In addition to laboratory work, I wanted to conduct cross-country hikes for such subjects as botany, geology, and zoology in the forests and swamps and hills of Massachusetts. And it was in connection with these plans that I learned a lesson in simplicity. I went to President Eliot, remembering the high sounding “Pierian Sodality” name for the college orchestra, to get a classical calendar name for my cross-country tramps. He said, “What, in brief, is your idea?” I replied, “In ordinary language they will be natural history walks.” He took a pen and said, “Why not this for a name?” On the paper was written “Natural History Walks.”