Hi Ken, thanks that's really cool to have that PDF version!

I found mine at an antique store in Wiscasset, Maine, with "Property of U.S. NAVY" stamped on the inside.

Another cool old one I've got is "A Manual of Engineering Drawing for Students and Draftsmen", Thomas E. French 1918. Looks like that's available at archive.org too!

I've also got:



That's even there too search for "Practical geometry LE CLERC" !

- Michael