Here's some history and a photograph of her under tow.

B.L. Pennington is rigged as a 3-masted schooner but the rig looks somewhat small for the size of the ship. No sails, booms, or gaffs are in evidence, but there's a funnel, forward of the foremast. It's too small to feed a propulsion engine and in the wrong part of the ship so I think it's a "Donkey boiler" driving auxiliary systems. These were common on oceangoing sailing ships of the period as a means of reducing crew size and cost by doing some of the heavy work like hoisting sails and anchors.

Hull form is bluff and quite ugly -- I doubt this ship could move much under sail, which brings up the possibility that it could be a "Schooner barge" designed to be towed most of the time by a tug, using sail as an auxiliary power source to save fuel in favorable conditions. This was a common arrangement on the East Coast but dates to a slightly later period there. I'm not sure if it was used on the Lakes at all.

Chapelle's "American Sailing Ships" does not have a specific chapter on the Lakes but he does include a few sentences on Great Lakes schooners in the schooner chapter. This discussion is too short and general to help much in this case; it says Lakes schooners rarely had masts all the same size but could have up to 5 masts. It is hard to imagine Pennington coming all the way up the St. Lawrence and through the locks, even with a tug helping.

Nice photo. Vessel on the left looks like a whaleback, and unusual Great Lakes type of freighter.

[Click the link in the caption. —Dave]