Reaching away far below the level of the prairie was a bowl-like valley, a mile long and half as wide, with a crystal stream lying like a ribbon of silver midway between its sloping walls. Another valley, longer yet, served as an extension to this. On the one side the high grassy walls were broken with frequent gullies, while on the other side was a park-like growth of forest trees. Meadows and fields lay between, and nestling against the eastern or grassy wall was the quaint, old-fashioned German house of the learned doctor. Its windows looked out on those beautiful little valleys, the property of the doctor--a little world far below the great prairie out of which sportive and patient Time had hollowed it. Externally the long, low, steep-roofed house was German, ancient, and picturesque in appearance. Its main floor was all enclosed in the sash and glass frame of a covered porch, and outside of the walls of glass were heavy curtains of straw, to keep out the sun in summer and the cold in winter. In-doors the house is as comfortable as any in the world. Its framework is filled with brick, and its trimmings are all of pine, oiled and varnished. In the heart of the house is a great Russian stove--a huge box of brick-work, which is filled full of wood to make a fire that is made fresh every day, and that heats the house for twenty-four hours. A well-filled wine-cellar, a well-equipped library, where Harper's Weekly, and _Uber Land und Mer_, _Punch_, _Puck_, and _Die Fliegende Blätter_ lie side by side, a kindly wife, and a stumbling baby, tell of a combination of domestic joys that no man is too rich to envy. The library is the doctor's workshop. He is now engaged in compiling a digest of the economic laws of nations. He is already well known as the author of a _History of Socialism_ (in Germany, the United States, Scandinavia, Russia, France, Belgium, and elsewhere), and also for his _History of Socialism in Germany_. He writes in French and German, and his works are published in Germany. [Illustration: PRAIRIE SOD STABLE]