ADULTERY, punishment of 482 _See also_ INFIDELITY ADVANCEMENT OF TRIBES 579-580 AGED PEOPLE, treatment of 422, 443-444, 576-577 AGRICULTURE— among the Missouri Indians 463-464 claim to land based on 477 need of 543 of the Plains tribes 407 AMERICAN FUR COMPANY, traders of 621 AMPUTATION, practice of 427-428 ANIMAL LIFE, of the upper Missouri 410-412 ANIMAL SYMBOLS, use of 412 ANIMALS— belief concerning: 487 custom regarding killing of 412 list of, used for food 583 ANNUITIES, distribution of 473 ANTELOPE, hunting of 535 ANTIQUITIES, absence of 413, 414 ARIKARA— migration of 405 pottery of 413 ARROW AND BOW, used in buffalo hunting 542 ARROWS, game played with 570 ASSINBOIN INDIANS— advancement of 579-580 attitude of, toward debts 476 character of 459 characteristics of 397,468 discussion of method of dealing with 470-474 etymologic interpretations of the name 381 intellectual capacity of 593-602 intertribal relations of 403-404 names of 396 origin of 395 progress of 620-623 strength of, compared with white man's 529 territory occupied by 396-397 traditional origin of 382 ATONEMENT, no conception of 490 AUDUBON, assisted by Denig 381 BAD ANIMAL, Assiniboin war leader 402 BALL GAME, described, 565-566 BAND, composition of 431 BEADS— use of 590 BEAR— claws of, worn as necklace 553 dead, invocations to 499-500 killing of 537-538 BEARD— extraction of 593