This occurred since the surveying and photographing. It
is rather remarkable that the frail adobe walls withstood so long the
unusual strain, or even that they sustained the addition of a top story
at all.
In the preceding examples the passageway was covered throughout its
length by rooms, but cases occur in both Tusayan and Cibola in which
only portions of the roof form the floor of superstructures. Pl. CIV
shows a passage roofed over beyond the two-story portion of the building
for a sufficient distance to form a small terrace, upon which a ladder
stands. Pl. XXIII illustrates a similar arrangement on the west side of
Walpi. The outer edges of these terraces are covered with coping stones
and treated in the same manner as outer walls of lower rooms. In Zu?i an
example of this form of passage roof occurs between two of the eastern
house rows, where the rooms have not been subjected to the close
crowding characteristic of the western clusters of the pueblo.
DOORS.
In Zu?i many rooms of the ground story, which in early times must have
been used largely for storage, have been converted into well-lighted,
habitable apartments by the addition of external doors. In Tusayan this
modification has not taken place to an equal extent, the distinctly
defensive character of the first terrace reached by removable ladders
being still preserved. In this province a doorway on the ground is
always provided in building a house, but originally this space was not
designed to be permanent; it was left merely for convenience of passing
in and out during the construction, and was built up before the walls
were completed.
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