Guess I'm not the only one not getting much done this morning ... :-)

I was under the impression that treenails were square in section,
and tapered lengthwise.  Hewett doesn't say anything about them
but there's a picture of one on page 145 of Wolfram Graubner's
"Encyclopedia of Wood Joints" (ISBN 1-56158-004-X) which is as
just described plus a four-sided pyramid to point the tip.

As in furniture, I thought the square sides, driven into a round
hole, gave the peg more bite and that the taper was to help
insertion into a draw-bored tenon.

I don't suppose there's a source for ready-made treenails ?
I should have started splitting last winter.  Actually, next
time I lose power for eleven days during an ice storm, I'll
now have something to do while watching the fire :-)

Paul Pedersen
Montreal (Quebec)
http://www.cam.org/~perrons/Paul/Woodwork/woodwork.html