Hi Northern Hewer,

I dug out some references to master buiders marks left on old structures:
1) Richard Babcock, Old Barns in the New World; Berkshire House Publishers: Lee Ma, 1996, pp.60-61, p. 151-152 (possibly 1500s Chapel),
2) Richard Babcock, Barns Whose Roots Run Deep; (no publisher listed), 2004, p.27, p.36, p.38, p.41, p.58,
3) Richard Babcock, Barns; Researched, Restored, and Resurrected Using Ancient Methods; (no publisher listed), 1998, p. 13b, p.21 (possibly 1500s Chapel)

The above also have lots of pictures/info on "the bull wheel" (capstan) and gin poles used in raising very large structures by hand.

If you can't find the above and are interested, email me, I know Mr. Babcock and can put you in touch for the publications (I watched him hew a beam yesterday!, He's in his 70s and still going......)

Best regards,

Mad Professor