Their
preservation is largely due to their sheltered position among the
rocks and an exceptionally dry climate.
The houses are invariably built upon high cliffs on shelving
rocks in places that are almost inaccessible. In some instances
they can only be reached by steps cut into the solid rock, which
are so old and worn that they are almost obliterated. Their
walls so nearly resemble the stratified rocks upon which they
stand, that they are not easily distinguished from their
surroundings.
The cliffs are often sloping, sometimes overhanging, but more
frequently perpendicular. The weather erosion of many centuries
has caused the softer strata of exposed rocks in the cliffs to
disintegrate and fall away, which left numberless caverns wherein
this ancient and mysterious people chose to build their eyrie
homes to live with the eagles. The houses are built of all
shapes and sizes and, apparently, were planned to fit the
irregular and limited space of their environment. Circular watch
towers look down from commanding heights which, from their shape
and position, were evidently intended to serve the double purpose
of observation and defense.
In the search for evidence of their antiquity it is believed that
data has been found which denotes great age. In the construction
of some of their houses, notably those in the Mancos Canon, is
displayed a technical knowledge of architecture and a
mathematical accuracy which savages do not possess; and the fine
masonry of dressed stone and superior cement seem to prove that
Indians were not the builders.
