I've been into Civil War and related historical events. I've looked in the obvious places, and had a lot of fun on newspaper sites, but it seems like there could be valuable information just sitting somewhere in an attic etc. One thing that comes to mind is the archives of book, newspaper, and magazine publishers. Not just the published copies, but earlier drafts, correspondence, notes from interviews, tips, etc. It doesn't seem like there is much of this available. Does anyone have suggestions for research avenues? Has anyone had luck with a publishing company - do they keep their records that long?