37 ° CAVE AND CLIFF DWELLERS. 
there is some closer affinity between the 
Arizona and Mexican cliff dwellers than 
this simple but suggestive one I have 
mentioned. It is certainly a question I 
would like to see some good archaeologist 
struggle with for a year or two. 
So steep are the walls of the Arroyo 
de las Iglesias in many places where we 
observed cliff dwellers that, had they 
thrown an object from the little porthole¬ 
like window of their stone pens with 
ordinary strength, it would certainly have 
brought up in the canon bottom probably 
two hundred or three hundred feet below. 
How they can rear little children on 
these cliffs without a loss of one hundred 
per cent, annually is to me one of the 
most mysterious things connected with 
these strange people. 
They are worshipers of the sun, so 
