SMITHSONIAN* MISCELLANEOUS COLLECTIONS VOL. 52 



Another so-called "Indian tank," situated in a valley six miles 

 from the two reservoirs mentioned above, was used by Sr. Paisano 

 for watering his stock when the author visited the place. It con- 

 tained considerable water at that time (March), and from its geo- 

 graphical position is supposed to be the reservoir in the valley west 

 of the Tortilla Mountains, which is designated as a "tank" on the 

 United States engineers' map of 1879. Everything indicates that 

 this is undoubtedly an old Indian reservoir. 



2. RUIN 3 MILES EAST OF FLORENCE 



This ruin, having the form of a low mound, is situated not far 

 from the main irrigation ditch of Florence and about three miles 



FIG. 66. Ancient Reservoir 



east of that town. Although the compound form is not easily 

 detected in this mound, there is no doubt that it belongs to the 

 characteristic ruins of the Gila-Salt Valley. The absence of smaller 

 mounds in its neighborhood indicates that this settlement was never 

 of great size or importance. In the immediate neighborhood of 

 the modern irrigation ditch that now furnishes Florence with water 

 were found several sections of a much older, perhaps prehistoric, 

 ditch that once irrigated the fields cultivated by the aborigines 

 near the settlement. 



