Ted Savas does some nice reminiscing about Savas Woodbury, the publishers, on his blog. I still cite material from Civil War Regiments.
As for his erstwhile partner David Woodbury, he has published an intriguing snatch of correspondence between Stanton and Grant on his own blog. He thinks the exchange is mainly about evicting McDowell. I think it is mainly about evicting Halleck. (So says a comment - not mine - as well.)