"We are now approaching the end of our Yellowstone tour. We have seen only the major features -- one or two examples of each type of scenery. To appreciate the Park and to know what it means to the people of the world, you must go there yourself, feel the freedom of the great out--doors, and see these most beautiful, most curious and most wonderful works of the Creator. In this picture you notice that, in the Beaver Dam, which is the longest one in the Park, the beavers have, by instinct, curved each segment of the dam to make it strong enough to withstand the pressure of this large lake."