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Timothy H. O'Sullivan
21. Ruins in Canon de Chelle, N.M., in a cavity in the wall, 60 feet above present bed of Canon. Height of walls about 700 feet. The present race of Indians know nothing of the age of these buildings or who occupied them.
[Wheeler Survey, Explorations and Surveys West of the 100th Meridian]
1871-1874 (survey), 1873 (expedition)