66 PICTURE-WRITING OF THE AMERICAN INDIANS. 
promontory, at the base of which is a large shallow cavern, the opening 
being smaller than the interior, upon the roof and back of which are 
FG. 26.—Petroglyphs in Najowe valley, California. 
many designs, some of which are reproduced in Fig. 25, of forms similar 
to those observed at San Mareos pass. Several characters appear to 
Fie. 27,—Petroglyphs in Najowe valley, California. 
have been drawn at a later date than others, such as horned cattle, ete. 
r eo : : . 
The black used was a manganese compound, while the red pigments 
