The variation in depth at bow and stern in some of the kayak-form canoes seems to have been related to the position of the greatest beam; when the beam was abaft the midlength, the greatest depth was aft, whereas when the greatest beam was amidships, the depth at the ends was equal. With the beam abaft midlength, the weight of the paddler trimmed the canoe by the stern somewhat, hence greater depth aft than forward was necessary to make the canoe run easily and turn readily in smooth water. In the sea kayaks of the eastern Eskimo, on the other hand, the depth and the draft were greatest forward, to bring them head to the sea when paddling ceased. The Alaskan sea kayaks were commonly of equal draft at bow and stern or might have a slightly greater draft aft than forward. A third variation of the kayak form existed in British Columbia in early times, and apparently was employed by the Beaver, Nahane, and Sekani. It was an undecked bateau-shaped canoe having a fair sheer in a long sweep from end to end, the stem profiles were nearly straight, the ends were raked rather strongly, and the bow was somewhat higher than the stern. The beam was greatest slightly abaft midlength. It is estimated that canoes of this type, which has long been extinct and now can only be reconstructed from a model, were about 14 feet 8 inches long and 30 to 36 inches in beam, and probably were built of both spruce and birch. The gunwales of the kayak-form canoes were formed by inwales and outwales; no caps were employed. In the Alaskan types and in the extinct British Columbia bateau variation, the gunwale lashings were continuous, but in the Mackenzie models the lashings were in groups. Inwales and outwales in all the kayak forms ran to the stem-pieces, which were plank-on-edge of a thickness that varied according to tribal practice. No headboards were employed. The gunwale members were rectangular in cross-section and were bent square with the flare of the sides. The ends sometimes were swelled and rounded, and in the bateau variation the gunwales, in cross section, appear to have been rounded. Six thwarts appear in most of the kayak forms but the Loucheux model had five and the bateau variation seems to have had but three. [Illustration: Figure 148 ATHABASCAN HUNTING CANOES OF THE KAYAK FORM, showing characteristic hull shape. These canoes were light, handy, and fast.]