On returning to Washington, the author received a commission to make an ethnologic collection for the World’s Columbian Exposition, and, selecting the Kiowa for that purpose as a representative prairie tribe, started out again almost immediately to the same field. This trip, lasting three months, gave further opportunity for study of the Ghost dance among the same tribes. After returning and attending to the labeling and arranging of the collection, a study was made of all documents bearing on the subject in possession of the Indian Office and the War Department. Another trip was then made to the field for the purpose of investigating the dance among the Sioux, where it had attracted most attention, and among the Paiute, where it originated. On this journey the author visited the Omaha, Winnebago, Sioux of Pine Ridge, Paiute, Cheyenne, and Arapaho; met and talked with the messiah himself, and afterward, on the strength of this fact, obtained from the Cheyenne the original letter containing his message and instructions to the southern tribes. This trip occupied about three months. A few months later, in the summer of 1892, another journey was made to the West, in the course of which the southern tribes and the Sioux were revisited, and some time was spent in Wyoming with the Shoshoni and northern Arapaho, the latter of whom were perhaps the most earnest followers of the messiah in the north. This trip consumed four months. After some time spent in Washington in elaborating notes already obtained, a winter trip (1892–93) was made under another commission from the World’s Fair to the Navaho and the Hopi or Moki, of New Mexico and Arizona. Although these tribes were not directly concerned in the Ghost dance, they had been visited by apostles of the new doctrine, and were able to give some account of the ceremony as it existed among the Havasupai or Cohonino and others farther to the west. On the return journey another short stay was made among the Kiowa and Arapaho. In the summer of 1893 a final visit, covering a period of five months, was made to the western tribes of Oklahoma, bringing the personal observation and study of the Ghost dance down to the beginning of 1894.