The framework of the canoes was usually spruce or larch. Toward the south and along the St. Lawrence some white cedar was used, and in the south maple was sometimes used for thwarts. The ribs of the canoes inspected by Adney were usually about 3 inches wide, and a short taper brought them to about 2 inches at the ends, where they were cut square across. They were spaced about 1 inch apart edge-to-edge amidships and somewhat further apart toward the ends of the canoe. The canoes usually had an odd number of ribs, as the first was placed under the thwart amidships. The last three ribs at the ends were "broken" at the centerline to allow them to take the necessary ~V~-section there; but the fourth rib from each end was only sharply bent. In some canoes the heel of the very narrow headboard was stepped on the sheathing against the endmost rib, in others it was stepped, as in the Micmac canoes, on a frog which rested against the endmost rib. [Illustration: Figure 95 STRAIGHT AND CROOKED CANOES, EASTERN CREE.] In more recent times the sheathing was laid in one of two ways, according to the preference of the builder, but the existence of the two styles suggests that each was once a tribal-group method. One method of shaping the bottom sheathing was to employ a center, or keelson, piece in two lengths, the butts being overlapped amidships, parallel-sided except toward the stems, where it was tapered to fit the ~V~-sections rather closely. The next strake outboard was short and was in the form of a shallow triangle with its base along the middle portion of the first strakes and about one-third the length of the bottom. Its apex was under the middle thwart. The next strake outboard was in two lengths lapped amidships, parallel sided along the arms of the triangular strake, and snied off at the ends to fit along the sides of the first strake. Another strake outboard of this was similar in form and position, but longer. Thus seven strake widths would complete the bottom sheathing. The side sheathing was narrow and slightly tapered; each strake in two lengths overlapped slightly amidships. The ends of the topside sheathing ran well into the ends, in most canoes, where they apparently served as stiffening. The second method of sheathing employed parallel-sided strakes throughout, laid side by side on the bottom, with the ends snied off to fit the form of the bark bottom. The existence of a model canoe made about 1850 (see p. 91) supports the theory that the first method was originally the Montagnais tribal construction and that the more primitive second method was probably Cree or Nascapee.