ADMINISTRATIVE REPORT 15 
Prescott. At both places the ruins were found to be of the 
same dual character. In a few instances, as at Frog Tanks, 
near the mouth of the Agua Fria, the ruins suggest the 
great houses or compounds of the Salt and Gila Valleys, 
but here also trincheras and fragile-walled houses are the 
more common. 
The observations made by Doctor Fewkes during this 
field season indicate that the ruins in the region referred 
to are the remains of buildings so different in architecture 
from that of true pueblos that it is probable the culture of 
their occupants was also different. Doctor Fewkes reached 
the conclusion that the ruins of the forts and small dwell- 
ings referred to were constructed and used by a Yuman 
people whose descendants, more or less mixed with Apache 
and other nonrelated tribes, are represented to-day by the 
Walapai, Yavapai, and Havasupai Indians. Although 
the jacal domiciles of western Arizona were probably struc- 
turally similar to certain ancient houses in the Pueblo re- 
gion of New Mexico, the river-terrace houses of Walnut 
Valley resembled certain habitations of the lower Gila 
River more than they did the pueblos of the Rio Grande. 
On returning to Washington, Doctor Fewkes prepared a 
report on his observations in this interesting archeological 
tield, which, with suitable illustrations, is now in press as 
one of the accompanying papers of the Twenty-eighth 
Annual Report. 
Doctor Fewkes also gave considerable time to reading 
the proofs and arranging the illustrations of his memoir 
on Casa Grande, which likewise is to appear in the Twenty- 
eighth Annual Report. 
On the completion of the above work Doctor Fewkes 
commenced the preparation of another paper relating to 
‘“* Designs on, Prehistoric Hopi Pottery,’’ a subject to 
which he devoted much attention in connection with his 
studies of the Hopi Indians for 20 years. This memoir, 
which was well advanced toward completion at the close 
of the fiscal year, accompanied by numerous plates and 
text figures, is designed as a key to the interpretation 
