Although the most recent canoe forms employed by these three Indian groups were very much the same, this may not have been the case earlier. A common canoe model in this area was the so-called "crooked canoe," in which there was a very marked fore-and-aft rocker to the bottom without a corresponding amount of sheer; as a result the canoe was much deeper amidships than near the ends. Another common model had a rather straight bottom fore and aft, with some lift near the ends and a corresponding amount of sheer. Between these was a hybrid which had some fore-and-aft rocker in the bottom and a very moderate sheer. Not until the 1870's was any detailed examination made of the canoes in this area; then it appeared that the crooked canoe might be the tribal model of the eastern Cree only, while the Nascapee employed a straight-bottom model, but it is possible that the examination was limited and that Nascapee use of the crooked canoe was simply not observed. By 1900, however, the crooked model was in use not only by the eastern Cree and the Nascapee but also by the Montagnais. [Illustration: Figure 88 MONTAGNAIS CROOKED CANOE. (_Canadian Geological Survey photo._)] In the area around Fort Chimo and at the northern ranges of the eastern Cree and of the Montagnais the lack of good birch bark made it necessary to make up the bark cover out of many small pieces. This not only was laborious but made a rough and rather unsightly cover. Hence, some of the northern builders, particularly the Nascapee, substituted spruce bark, which was available in quite large sheets. The use of the spruce bark, however, did not cause any of these people to depart markedly from the model or the method of constructing birch-bark canoes, as it did for the Indians in the maritime area.