NO. 12 



SMITHSONIAN EXPLORATIONS, I917 



125 



the rim of a spur of this canyon or are perched on angular rocks 

 at its base. Even now, after centuries of wear, they show fine 

 masonry, although some of the mortar between the courses of stones 



Fig. 130. — Tower in Holly Canyon. Photograph by 

 J. Wirsula. 



has been washed out. There are small cliff-houses in the walls of 

 the canyon below these great houses. 



An instructive cluster of ruins in the Hovenweep district is the 

 Hackberry Canyon group situated about 2 miles east of Keeley 



