There is a widespread belief that twin children possess magical powers over nature, especially over rain and the weather. This curious superstition prevails among some of the Indian tribes of British Columbia, and has led them often to impose certain singular restrictions or taboos on the parents of twins, though the exact meaning of these restrictions is generally obscure. Thus the Tsimshian Indians of British Columbia believe that twins control the weather; therefore they pray to wind and rain, "Calm down, breath of the twins." Further, they think that the wishes of twins are always fulfilled; hence twins are feared, because they can harm the man they hate. They can also call the salmon and the olachen or candle-fish, and so they are known by a name which means "making plentiful." In the opinion of the Kwakiutl Indians of British Columbia twins are transformed salmon; hence they may not go near water, lest they should be changed back again into the fish. In their childhood they can summon any wind by motions of their hands, and they can make fair or foul weather, and also cure diseases by swinging a large wooden rattle. The Nootka Indians of British Columbia also believe that twins are somehow related to salmon. Hence among them twins may not catch salmon, and they may not eat or even handle the fresh fish. They can make fair or foul weather, and can cause rain to fall by painting their faces black and then washing them, which may represent the rain dripping from the dark clouds. The Shuswap Indians, like the Thompson Indians, associate twins with the grizzly bear, for they call them "young grizzly bears." According to them, twins remain throughout life endowed with supernatural powers. In particular they can make good or bad weather. They produce rain by spilling water from a basket in the air; they make fine weather by shaking a small flat piece of wood attached to a stick by a string; they raise storms by strewing down on the ends of spruce branches.