http://www.straightbourbon.com/forum...ight=old+tubIn addition to above mentioned article.I 've read the book of pacult and he also speaks of the sour mash.Now can Crow claim to be the inventor but can't it be possible that Beam already sold this sour mash and that Crow actually claims the recipe on a later date. So many things in history are claimed by persons who aren't the actual inventor or discoverer.Columbus wa'sn't the first to dicover America , the Vikings did. But Columbus gets the credit. See what i mean.