Jesse Walter Fewkes,
Prehistoric villages, castles, and towers of southwestern Colorado
(1919)
“ It is impossible from the data available to determine the century in which the towers and great houses of the region were constructed. Thus far a few were seen with great trees growing in them, but none with roofs; the state of preservation of the walls does not point to a great age. Several writers have regarded them as occupied subsequently to the Spanish conquest, while others have ascribed to them a very remote antiquity. It can hardly be questioned that the cliff-dwellers, and by inference their kindred, the tower builders, were superior in their arts to modern Pueblos. ”
