LXVIII BUREAU OF AMERICAN ETHNOLOGY 
for the illustrations was also substantially completed, and in 
June the memoir was assigned for publication in the Sixteenth 
Annual Report of the Bureau. 
Mr Mindeleff’s surveys, recorded in his report on Canyon de 
Chelly, were both extended and detailed, and have yielded 
a large body of especially trustworthy data relating to this 
interesting portion of the continent. In a large number of 
eases he made diagrams showing the ground plans of structures, 
based on careful measurements, and these plans were connected 
in plats, which were in turn combined into maps. Whenever 
practicable, the plans were supplemented by drawings in 
elevation and perspective, and by photographs; and the photo- 
graphic and other illustrations present vividly the characteris- 
tics of the region examined and the conditions under which 
the ancient cliff dwellers lived, moved, worshiped their mys- 
teries, defended themselves against enemies, died, and were 
buried. Many explorations have been made in the south- 
western region, and many students have collected material 
relating to the peculiarly intelligent aborigines of this district; 
but none of the explorations have been more thorough, none 
of the records more faithful, than that just completed by Mr 
Cosmos Mindeleff, and it is thought that his report will make 
Canyon de Chelly classic ground for the archeologist. 
Although conducted primarily for other purposes, the ex- 
pedition directed by Mr MeGee resulted in a number of 
interesting archeologic discoveries. Among these may be 
mentioned, (1) ‘Las Trincheras,” a class of temporary forti- 
fications about isolated buttes or peaks near habitable valleys, 
forming a new archeologic type for this country; (2) a con- 
siderable number of prehistoric village sites, irrrigation works, 
ete, m a region heretofore supposed to be barren «urcheolog- 
ically; (3) extended village sites, each dominated by one or 
more ceremonial or other grand structures, sometimes accom- 
panied by inclosures suggesting the domestication of animals; 
and (4) great acequias, carried farther up the valley sides than 
the present irrigation works, indicating more complete con- 
quest of the waters during prehistoric times than at present. 
The archeologic material collected during the expedition has 
