FEWKeEs] FORTS NEAR FROG TANKS 215 
Ruin Srx Mites BeLow Marx’s Rancu 
A ruined fort (pls. 85, 100) occupies a low limestone hill a short 
distance from the right bank of the river, where the valley widens 
somewhat before opening into Chino Valley. There was no running 
water in the stream in October, and possibly this condition exists at 
other times. On account of the level character of this region the 
fortification is visible a considerable distance from every direction. 
The walls, which are more or less broken down, cover the whole 
top of the hill. The general ground plan of the surrounding wall is 
roughly oval, its longer axis extending north and south; there is an 
entrance at the north. The periphery of the wall measures approxi- 
mately 227 feet. While a large part of the walls of rooms within 
the inclosure have fallen, so that they can not well be traced, a con- 
siderable section still remains, forming near the doorway what ap- 
pears to have been an entrance. 
The habitations dependent on this fort can be traced nearer the 
creek bed. On anisland farther down stream are walls of another ruin. 
FORT ON INDIAN HILL NEAR PRESCOTT 
On the summit of a symmetrical eminence, known as Indian 
Hill, not far west of Prescott, is a fort similar in construction to 
the forts overlooking Walnut Creek. The walls are extensive and 
in places well preserved, but a considerable section has fallen. No 
fragments of pottery were found here. 
In the vicinity of Thumb Butte, another eminence near Prescott, 
are pictographs not unlike those found in the Walnut Creek region. 
Remains of other Indian structures and settlements occur at 
various places near Prescott; these show that the aboriginal culture 
of this vicinity had many points in common, if it was not identical, 
with that of Chino Valley and the Walnut Creek region. 
Along Hassayampa and Granite Creeks and in Agua Fria and 
other valleys is found the same type of ruins, none of which are 
those of true pueblos. 
FORTS NEAR FROG TANKS, AGUA FRIA RIVER 
There are many forts and river-terrace ruins on the Agua Fria 
and other streams that head in the mountains about Prescott and 
flow into the Salt and the Gila. Those on the Agua Fria near Frog 
Tanks are typical. 
About a mile up this stream, near the Batre mineral claim, where 
the valley widens into a level area, or bar, rises a prominent hill 
crowned by the remains of an old fort (pl. 101). The walls here 
have fallen to so great an extent that it is almost impossible to trace 
the ground plan of the ruin. There appears to have been a citadel, 
