1890s, visiting Washington, D.C. often. Mountain Chief was a member of the Indian Congress held from August to October 1898 in conjunction with the Trans-Mississippi International Exposition in Omaha, Nebraska. Mountain Chief also travelled with a delegation to Washington, D.C. in 1903 to provide information related to the Blackfeet Nation and to speak with the United States Commissioner of Indian Affairs. Collaboration with anthropologists Mountain Chief collaborated with researchers Walter McClintock, Joseph Kossuth Dixon, and Frances Densmore. During the summer of 1898, Yale graduate Walter McClintock visited the Blackfeet Reservation and used a wax cylinder phonograph to record tribal elders, including Mountain Chief. McClintock returned to the Blackfeet Reservation in 1903 and 1905 to take photographs of the Blackfeet community, including one photograph of Mountain Chief that appeared in his book The Old North Trail (1910). Mountain Chief also appeared in Joseph Kossuth Dixon's book The Vanishing Race wearing an upright feather headdress with ermine fur and holding a horse efficacy. An account of Mountain Chief's childhood was included in Dixon's text as well. Dixon hoped to build a National American Indian Memorial at Fort Wadsworth on Staten Island overlooking New York harbor to memorialize what he termed the “first Americans." To create this memorial, Dixon gathered President William Taft, his cabinet members and military officers, the governor of New York, and 32 Plains Native Americans, including Mountain Chief, on February 22, 1913. During this meeting, Mountain Chief and the 32 other Plains Native Americans were photographed, and Mountain Chief gave a speech commending this goal but also criticizing the Administration of Indian affairs in the Blackfeet Indian Reservation. Dixon noted how “the nobility of his presence, the Roman cast of his face, the keen penetration of his eye, the breadth of his shoulders, the dignity with which he wears the sixty-seven years of his life, all conspire to make this hereditary chief of the Fast Buffalo Horse band of the Blackfeet preeminent among the Indians." Mountain Chief appeared in many photographs beyond those included in McClintock and Dixon's books. One of the most widely used photographs of Mountain Chief depicts him interpreting a recording for Frances Densmore at the Smithsonian. Interpreting song recordings for Frances Densmore In February 1916, Mountain Chief met with ethnomusicologist Frances Densmore at the Smithsonian Institution. Mountain Chief was interested in the preservation of Plains Indian Sign Language and consulted with General Hugh L. Scott