Here at last is a reproduction of the USN 1863 Dahlgren Howitzer manual. It comes with lots of additional material and instructions not only on handling the gun, but also the boats into which they are loaded. It also includes directions on the small arms to be carried by various crewmen on the launches. Book is $17 post paid. For more info, go to: http://www.civilwarnavalmuseum.com/shop/product_info.php?cPath=2&products_id=58