On the way up the canyon, perhaps two-thirds of the distance from the bridge to the Holmes Tower, midway in the alluvial plain and on the right bank of Mancos Creek, stands a circular ruin which conforms to Holmes’s description of Great Tower but is too poorly preserved to be positively identified. All that now remains of this building is a large pile of rocks with a central depression, but no signs of radiating partitions, although such may have existed when it was constructed and for many years after it began to fall into ruin. TOWERS ON THE MANCOS RIVER BELOW THE BRIDGE TOWER A There are two towers situated on the south side of the Mancos below the bridge on the Ship-rock Road, one about 6, the other 7 miles distant. The walls of the first of these (pl. 30, _b_) are visible for some distance and are about 6 feet high, evidently very much broken down on the south and east sides. Its shape is round and there is a pile of stones indicating rooms on the east side separated from the tower by a depression. It would be a valuable contribution to our knowledge of these ruins if some one would determine the nature of these pits, which can hardly be regarded as reservoirs, but suggest kivas. TOWER B The tower (pl. 31, _a_) situated farther down the Mancos River has a more commanding position than Tower A and is conspicuous because it stands on a projecting precipice, below the rim of which are walled-up artificial caves. These caves have apparently never been entered by white men; the walls of masonry are unbroken and there are square openings, windows or doorways, which can be made out long before reaching the place. This tower (pl. 30, _a_) is almost perfectly round, about 10 feet in diameter, and stands at least 6 feet high. The south wall has fallen. In the pile of rocks on that side may be readily seen the top of a straight wall reaching to the edge of the cliff as if for protection, but no other fallen walls may now be seen in the neighborhood. The face of the cliff below this tower (pls. 7, _b_; 31, _b_) is almost perpendicular, the component strata of soft shale alternating with harder rocks, the former well fitted for artificial excavations. The author was not impressed with the idea that any considerable number of troglodytic inhabitants dwelt in the small cliff rooms (pl. 31, _b_)[52] dug in it. Farther on there are other caves the walls of the entrance to which are still in sight. It is true the surface of the cliff may have been eroded and fallen in the time since they were abandoned. They appeared to be storage cists rather than inhabited rooms. [52] A good figure of these cavate rooms is given by Holmes, op. cit. Comparing the photograph with his figure it appears that their surrounding shale has worn away somewhat in the last four decades.