etails as coping
stones, chimneys, trapdoors, etc., the tapeline being used where
necessary to establish positions. The forms of the chimneys as well as
their position and size were also indicated on this drawing, which was
finally tinted to distinguish the different terraces. Upon this colored
sheet were located all openings. These were numbered, and at the same
time described in a notebook, in which were also recorded the necessary
vertical measurements, such as their height and elevation above the
ground. In the same notebook the openings were also fully described. The
ladders were located upon the same sheet, and were consecutively
lettered and described in the notebook. This description furnishes a
record of the ladder, its projection above the coping, if any, the
difference in the length of its poles, the character of the tiepiece,
etc. Altogether these notebooks furnish a mass of statistical data which
has been of great service in the elaboration of this report and in the
preparation of models. Finally, a level was carried over the whole
village, and the height of each corner and jog above an assumed base was
determined. A reduced tracing was then made of the plan as a basis for
sketching in such details of topography, etc., as it was thought
advisable to preserve.

These plans were primarily intended to be used in the construction of
large scale models, and consequently recorded an amount of information
that could not be reproduced upon the published drawings without causing
great confusion.

The methods followed in surveying the ruins underwent some changes from
time to time as the work progressed. In the earlier work the lines of
the walls, so far as they could be determined, were run with a compass
and tapeline and gone over with a level. Later it was found more
convenient to select a number of stations and connect them by
cross-sights and measurements. These points were then platted, and the
walls and lines of debris were carefully drawn in over the framework of
lines thus obtained, additional measurements being taken when necessary.
The heights of standing walls were measured from both sides, and
openings were located on the plan and described in a notebook, as was
done in the survey of the inhabited villages. The entire site was then
leveled, and from the data obtained contour lines were drawn with a
5-foot interval. Irregularities in the directions of walls were noted.
In the later plans of ruins a scal