280 
AGUA PRIETA TO 
I do not know, is rarely heard, even among intelli- 
gent people, so habituated have they all become to the 
other form. 
One of the sandstone formations which lay directly 
by our path, after we had left the canon and were 
journeying along the valley, presented so singular an 
appearance, that I made a hasty sketch of it as I passed. 
The three columnar masses are about fifty feet in 
height. A small stream flows directly at their base, 
where there is a dam to raise the water and direct it 
into an acequia which irrigates the valley around. 
Columnar Eocks near Arispe. 
May ^Ist Our route continued along the bed of 
the river for about ten miles, the valley widening as 
we advanced and becoming more cultivated, when at 
