I just received a copy of "The Texas Gun Trade, 1780 - 1899", by Chris Hirsch. We don't normally think of Texas as a gunmaking state, so this book contains some surprises. There are a number of large caliber Plains Rifles by Texas makers, and even an original flintlock, made in Houston during the Texas Republic period by a gunsmith named Gustavus Erichson who settled there in 1838. This book fills in another piece of the puzzle that is American gunmaking.