... to be had, of larger calibre, be sent to this post, with a good supply of ammunition, as early as possible. I had one which I found to be excellent, but when the navy met with such a mishap in the Mississippi , I was compelled to let Flag Officer McKean have it, and one of my twelve-pounder Parrott guns, to put on one of his ships to save them from being driven out of the waters by a little steamer having ...