In some ancient examples, such additions to
the first plan undoubtedly took place without marring the general
symmetry. This was the case at Pueblo Bonito, on the Chaco, where the
symmetrical and even curve of the exterior defensive wall, which was at
least four stories high, remained unbroken, while the large inclosed
court was encroached upon by wings added to the inner terraces. These
additions comfortably provided for a very large increase of population
after the first building of the pueblo, without changing its exterior
appearance.
In order to make clearer this order of growth in Mashongnavi, a series
of skeleton diagrams is added in Figs. 10, 11, and 12, giving the
outlines of the pueblo at various supposed periods in the course of its
enlargement. The larger plan of the village (Pl. XXVI) serves as a key
to these terrace outlines.
The first diagram illustrates the supposed original cluster of the east
court (Fig. 10), the lines of which can be traced on the larger plan,
and it includes the long, nearly straight line that marks the western
edge of the third story. This diagram shows also, in dotted lines, the
general plan that may have guided the first additions to the west. The
second diagram (Fig. 11) renders all the above material in full tint,
again indicating further additions by dotted lines, and so on. (Fig.
12.) The portions of a terrace, which face westward in the newer courts
of the pueblo, illustrated in Pl.
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