Such was the general character of the dwellings of the Monguls in the days of Genghis Khan. They took their character evidently from the wandering and pastoral life that the people led. One would have thought that very excellent roads would have been necessary to have enabled them to draw the ponderous carts containing their dwellings and household goods. But this was less necessary than might have been supposed on account of the nature of the country, which consisted chiefly of immense grassy plains and smooth river valleys, over which, in many places, wheels would travel tolerably well in any direction without much making of roadway. Then, again, in all such countries, the people who journey from place to place, and the herds of cattle that move to and fro, naturally fall into the same lines of travel, and thus, in time, wear great trails, as cows make paths in a pasture. These, with a little artificial improvement at certain points, make very good summer roads, and in the winter it is not necessary to use them at all. The Monguls, like the ancient Jews, were divided into tribes, and these were subdivided into families; a family meaning in this connection not one household, but a large congeries of households, including all those that were of known relationship to each other. These groups of relatives had each its head, and the tribe to which they pertained had also its general head. There were, it is said, three sets of these tribes, forming three grand divisions of the Mongul people, each of which was ruled by its own khan; and then, to complete the system, there was the grand khan, who ruled over all. A constitution of society like this almost always prevails in pastoral countries, and we shall see, on a little reflection, that it is natural that it should do so. In a country like ours, where the pursuits of men are so infinitely diversified, the descendants of different families become mingled together in the most promiscuous manner. The son of a farmer in one state goes off, as soon as he is of age, to some other state, to find a place among merchants or manufacturers, because he wishes to be a merchant or a manufacturer himself, while his father supplies his place on the farm perhaps by hiring a man who likes farming, and has come hundreds of miles in search of work. Thus the descendants of one American grandfather and grandmother will be found, after a lapse of a few years, scattered in every direction all over the land, and, indeed, sometimes all over the world. It is the diversity of pursuits which prevails in such a country as ours, taken in connection with the diversity of capacity and of taste in different individuals, that produces this dispersion.