vol 1 is all about locks and the tools and jigs to make them all sorts of neat cuters
Vol 11 two Virginia rifles as documents and traditions shop tools, processes and tech
The golden mean proportion in Baroque and Rococo Firearms Design
A Patch box release mechanism
A Barrel Crowning tool
Making and using a Scratch-Stock for forearm molding
Vol 111 Handwork and Artifice Summarized essay seven, parts five and six "the gunmaker and the Gunstocker" Sprengel Berlin 1771 translated by Maria von Nicolai and John Bivins (German on the left and English on the right)
Vol 1V handwerk und kunsie in Tabellen the Gunfactory
A Study of Lock timing
A Wheellock Mainspring Vise
Vol V rifle making workmanship ...a rifle by John Sheetz
Charcoal Bluing of rifle Barrels
Cock Forging ..A study in Technology
Ramrod and walking stick tool
Vol 1 is packed with informationon making locks more than any other book I've seen .
I bought my books from the NMLRA back in the '90's I have seen them from time to time on EBAY ...you might try one of the used book sellers to fine a copy