Bayou B, I gave away my NA books to a member on the site so I'm sorry I cant post a picture. I do believe that the inner bark (cane would be the thin "rind" or hard outer cover. That was stripped off in long strips and then wet like doing cane backed chairs. That way ya can "wrap tie the string" to form a knot, The ones I had pics of the "string was 2 ply (2 strips) back to back and was not twisted. Also the bows they were on did not have string knocks either as the string was simply tied to a sharp tapered bow tip. The same type of string can be made out of basswood inner bark in that case the outer bark was beaten with a stick while it was still on the tree. Then the bark was pealed off. Most of the time the inner bark stays on the tree and peals off easily....it is realy suple and strong and can be used "flat" or twisted like a hide string.
About the bow weight, the same book related an early report to the Smithsonian where "a well ossified" buffalo vertebra was found with a "hoop iron arrow point" the bone had been completely penetrated. When you analyze that the arrow would have to have penetrated the buffalo's tough hide, then about a foot of heavy muscle and then the bone....that means the bows were indeed heavy weight.
Oglala, I'm satisfied that the limb will not be a problem again . There was no movement at all after the repair....just like it never happened. Also the hide glued sinew wouldn't allow the split to go past it So I dont believe that it is not as strong as it ever was. I pulled a chest muscle stringing this beast so I'm all done with it ...you can pull these babies all day long so have some fun with her....and thank you for your friendship and knowledge sir.
rich