These Coastal tribes (Haida, Tsimsyan, Kwakiutl, Nootka and Coast Salish) had however, many difficulties to overcome, hemmed in as they were by stormy seas along the narrow strip of coast line where they lived in great communal wooden houses, with a background of dense forests and steep mountain ranges. For all their daily needs as well as their artistic output they had to rely upon such substances as stone, bone, ivory, wood, horn and a forn of slate found only on Queen Charlotte Islands. Paints were used very sparingly for decorative purposes. Colours were confined to black, dull red, a copperish blue which turned dark green on exposure and pale yellow. The usual sources were cer- tain ochrous earths or copperish clay, fungi, burnt clam shells and charcoal, combined with salmon oil. For polish, shark's or dog-fish skin or their own bare hands were used. Fach man had to collect, test and prepare his own materials and solve his own problems. Nevertheless these men pecked, incised, sculptured, carved, moulded, inlaid and painted wellnigh every possession whether the bow of a war canoe, the wooden pail which carried water, domestic utensils, fishing equipment, armour, and the elaborate paraphernalia associated with ceremonial celebrations. These last included Chief's headdresses (the fine carving often completed with inlays of iridescent abalons shell) and richly carved batons, also shamans! rattles, exquisitely moulded horn dishes and spoons, polished ivory charms and, greatest triumph of all their skills, ceremonial and portrait masks. Decorated chests stored possessions; sculptured posts Supported weighty roof beams and recorded the crests or mythical ancestry of chiefs on memorial or, in later times, on totem or heraldic poles. (These last, by the way, were long preceded by huge Housefront paintings, measuring 30 feet by 20 or even more.) Conditions and customs contributory to the subject matter of the Northwest Coast Indian arts and crafts. Ethnologists agree that it is impossible to understand the art of the Northwest Pacific Coast natives apart. from some in- Sight into the structure of their culture. The whole existence of these people revolved round their intricate and varied social and religious organization. This was based on wealth, rank and social standing; it permeated every detail of their lives from cradle to grave and interwoven therewith were unusually binding ties of kinship and tribal obligations. No form of idolatry existed, though the "Great Spirit" was the prevailing object of worship. In some tribes he was repre- Sented by the Sun or the Moon. Prayers and the first fruits of sea food or the products of hunting or berries in their season suas