Square Rule documentation

I'm looking for a detailed description/tutorial of the Square Rule method. Any recommendations?

[This message has been edited by cbyrd (edited 01-02-2002).]

I believe there is a book describing square rule timber framing written by Jack Sobon which is available from Summer Beam books. Her web page is www.summerbeambooks.com and her phone number is 1-877-272-1987. Good luck, Jim