Ruins comprised in the second class are located on the bottom lands, generally at the base of a cliff, and without reference to the defensibility of the site. They are, as a rule, much broken down, and might perhaps be classed with the ruins already described, but there are some distinctive features which justify us in separating them. Ruins of this class are always located either at the base of a cliff or in a cove under it, on the level or raised but slightly above the bottom land, and sometimes at a considerable distance from the stream. The ground plans can generally be distinguished, and in many instances walls are still standing--sometimes to a height of three stories. The ground plans reflect more or less the character of the site they occupy, and we would be as much surprised to find plans of their character in the open country as we are to see plans of class I within the canyon. Unlike the ground plans of class I, those of this group were laid out with direct reference to the cliff behind them, and which formed, as it were, a part of them. [Illustration: Plate XLIV Section of Old Walls, Canyon De Chelly] In point of size, long period of occupancy, and position these villages were the most important in the canyon. The ruins often cover considerable areas and almost invariably show the remains of one or more circular kivas. Sometimes they are located directly upon the bottom land, more often they occupy low swells next the cliff, rising perhaps 10 feet above the general level and affording a fine view over it. Sometimes they are found in alcoves at the base of the cliff, but they always rest on the bottom land which extends into them; these merge insensibly into the next class--village ruins on defensible sites--and the distinction between them is partly an arbitrary one, as is also that between the last mentioned and the cliff ruins proper. [Illustration: Fig. 1--Ground plan of an old ruin in Canyon del Muerto.]