I've completed a first stab at a body plan derived from Markkula's "Offsets for 7-Station Form for 9'x26" Rushton Canoe 'Sairy Gamp'" as published in the Atwood Manley book. Some immediate problems with his work become apparent. First, a building form would normally be sized to the inside of the planking, but his dimensions appear to be outside planking. I say this because the maximum beam in his table is 13 3/16" for the half-width at station 4, which gives a total beam of 26 3/8". Secondly, some of his numbers are clearly wrong without drawing anything - for example, the sheer strake end of station #2 flares gently until the last 7/8", after which it abruptly turns inward. Thirdly, his dimensions for the widths at gunwale height appear to be to the outside of the gunwale except for his value for station 2 mentioned above which is just not usable - you cannot fair the lines of the station into his widths at gunwale height without assuming a gunwale. Finally, and maybe most disconcertingly, I can't believe he has the gunwale heights correct at least for stations 3 & 4. Using his numbers, the overall outside depth at the center of the boat is 7 1/16", or about 6 7/8" inside depth. I don't think that would float, at least for very long. Further, trying to draw in a fair sheer line in the body plan is not possible given his gunwale heights.
What I have done is drawn the stations as faired curves as a starting point for lofting, assumed a gunwale measuring about 1/2" wide by 5/8" tall at station 4, and brought the heights of stations 3 and 4 up so they would give that fair sheer line. In my drawing, attached, Markkula's dimensions appear in red. I may try to scale his profile view to understand better what the depth should be.