The regular services take place on Sunday, in the morning, afternoon, and evening. Sunday has been held sacred among the Nez Percés and neighboring tribes for more than sixty years, as the result of the teachings of the Hudson Bay officers. The prairie tribes also, having learned that Sunday is the great “medicine day” of the whites, now select it by preference for their own religious ceremonies of the Ghost dance and the mescal. There are also services during the week, besides special periodic observances, such as the “lament” for the dead, particularly the dead chiefs, in early spring; the salmon dance, when the salmon begin to run in April, and the berry dance, when the wild berries ripen in autumn. The description of the ceremonial of the salmon dance will answer for the others, as it differs chiefly only by the addition of the feast. [Illustration: +Fig. 65+—Charles Ike, Smohalla interpreter.] As already stated, the house has the door at the eastern end, as is the common rule in all Indian structures. On the roof, at the eastern end of the building at Paʾkiut, are the flags, the center one blue, representing the sky; another one white, representing the earthly light, and the third yellow, representing the heavenly light of the spirit world. Blue, white, and yellow are the sacred colors of this system, as also of that of the Shakers, to be described later. On entering, the worshipers range themselves in two lines along the sides of the building, the men and boys standing along the northern wall, the women and girls along the southern wall, and all facing toward the center. The first man entering takes his place on the north nearest the door; the next one stands just beyond him, and so on; while the women and girls, when their turn comes, make the whole circuit along the northern side, and then, turning at the farther end, take their places in reverse order along the southern wall. In the open space between the rows is a floor-walker, whose business it is to see that everyone is in the right place. All are dressed as nearly as possible in the finest style of the old Indian costume, buckskin and shell ornaments, their faces painted yellow, white, or red with Indian paints, and carrying eagle feathers in their right hands (plates +XC+, +XCI+; figure 66). [Illustration: +Fig. 66+—Diagram showing arrangement of worshipers at Smohalla service.] At the farther end, facing the door, sits the high priest, while just behind him stands his “interpreter,” and on his left are seated on the ground the three drummers with their large drums in front of them. The high priest carries a large bell in his left hand and a smaller one in his right.