Does anybody know anything about archival holdings in Pennsylvania? I would like to know if there are any collections rich in distilling history that might shed some light on early distilling history. I am particularly looking for letters that mention charred barrels. I have found one from the early 1820's at The Filson Club Historical Society that is very interesting. The writer is a merchant in Lexington, Ky. that tells his Bourbon County distiller that he has heard that if the barrels are charred on the inside, then the flavor of the whiskey will be greatly improved. I would like to find similar letters in Pennsylvania. I suspect that the Pittsburgh area would be the best place to look for distillery papers, but I may be wrong. Anybody have any suggestions?