Article by Washington Matthews on the Navajo ceremonial basket drum, a coiled sumac-twig basket used inverted as a drum in the nine-night night-chant ceremony. It covers the basket's construction, butt-and-tip rules, decorative band with a gap, plaited rim finish and its legend, and the ritual handling of the basket. A second part describes the yucca-leaf drumstick, how its leaves are gathered, its ritual use and ceremonial unraveling. Two figures show the basket and the drumstick.