Last week I traveled to Fremont, Ohio for the Living History Fair. On the way back to Columbus I decided to take a short detour up to Port Clinton, which lies just west of Sandusky Bay and the Marblehead/ Catawba peninsula. Port Clinton sits at the mouth of the Portage River, which winds lazily southwards to the interior of the state. In the summertime this is the Lake Erie vacationland, a poor man's Riviera. In the winter its largely deserted, save for ice fishermen.
A small carronade (the sawed-off shotgun of 18th century naval artillery) sits near the beach, pointing out to sea. I measured the bore to 4.5 inches, which is the right caliber for a 12-pounder piece. The plaque stated that the gun had been used during the Battle of Lake Erie. According to wikipedia.org's well-researched page, the American vessels at the battle only carried 32-pounder carronades. The only ships bearing 12-pounder carronades were the brig HMS Hunter and the schooner HMS Lady Prevost.