The derring-do - or mostly just the goddamn awfulness - of folks history has labelled Outlaws, has always been a large part of the Western writer's research. From snippets of their sorry lives come the secondary research as to the why and the how that makes up the motivation driving a wholly imagined character.
So I was pleased to come across, by accident as often these things happen, the blog of The American Cowboy and his post which lists a whole host of lesser known varmints.
And no sooner do I turn around than I find that Tom Rizzo has a post about the exploits, or lack of them, of the Jennings Gang.
Do check them out. Both well worth the read.