the angle between the two.[80]


THE WATER SUPPLY OF PRAENESTE.

In very early times there was a spring near the top of Monte Glicestro.
This is shown by a glance back at plate III, which indicates the
depression or cut in the hill, which from its shape and depth is clearly
not altogether natural and attributable to the effects of rain, but is
certainly the effect of a spring, the further and positive proof of the
existence of which is shown by the unnecessarily low dip made by the
wall of the citadel purposely to inclose the head of this depression.
There are besides no water reservoirs inside the wall of the arx. This
supply of water, however, failed, and it must have failed rather early
in the city's history, perhaps at about the time the lower part of the
city was walled in, for the great reservoir on the Corso terrace seems
to be contemporary with this second wall.

But at all times Praeneste was dependent upon reservoirs for a sure and
lasting supply of water. The mountain and the town were famous because
of the number of water reservoirs there.[81] A great many of these
reservoirs were dependent upon catchings from the rain,[82] but before
a war, or when the rainfall was scant, they were filled undoubtedly from
springs outside the city. In later times they were connected with the
aqueducts which came to the city from beyond Capranica.

It is easy to account now for the number of gates on the east side of
the city. True, this side of the wall lay away from the Campagna, and
egress from gates on this side could not be seen by an enemy unless he
moved clear across the front of the city.[83] But the real reason for