Thought I would give a shot out to Anson (a fellow Net54 member). Over time he has been compiling an outstanding resource for collectors of all PreWW2 cards, with great articles detailing various aspects of all PreWW2sets, even the obscure, collecting angles, checklists, images of cards, rarities etc., and not just baseball but all the major sports...there's even wrestling.
The Old Cardboard site has always been a standby for me (there's an icon link for it on the upper right of this forum's homepage), and is still a great resource, but for the last few months I find myself utilizing his website more frequently, and I thought everyone should be aware of it.
And he is a prolific writer...something new comes out every few days it seems. Here is the link to his site, in case you haven't already discovered it:
www.prewarcards.com
brianp(arker)-beme