Thank you!
Thank you Phillip for the extra info, and Thank you Rudi for the link and more info.
A couple of years ago I wanted to get a bike to ride and my neighbor helped me build one. Then I bought another one at a non-profit bike store when they moved their inventory (and another frame and forks). Somehow, I wound up getting a worn out Wright (or maybe Ideale) with frame, and asked the proprietor if putting new leather on an old seat was something people did. He responded not so much, that it was probably more trouble than it's worth, and anyway it would certainly be a "non-trivial" problem to solve (I loved his response, and it's all probably his fault, now that I think about it)...
You guys make it look easy! Anyway, low these many moons later, I have a couple beaten saddles/frames, some cow leather (Macpherson's is just up the road, but I didn't get vegetable tanned stuff, so I'll have to go back at some point) and, as of the other night, a used compressor (sans a scoosh of oil).
I'm grateful for all the info you all have shared, and if I make any headway, I will be certain to update. May take a little while, though.
x