Jefferson (Steamboat), 1 Jun 1848

The U.S. Steamer JEFFERSON, arrived late on Saturday night in the Lachine Canal; and the schooner GEORGE DAVIS, with the paddle-wheels of the DALLAS and other gear on board, passed into the canal at Lachine, on Sunday evening, and arrived in port yesterday. - Montreal Herald.
      Buffalo Daily Courier
      Saturday, July 8, 1848

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      The schooner GEORGE DAVIS, which accompanied the iron steamer DALLAS, down the St. Lawrence, has returned to this port. She was eight days on her return trip from Montreal, being the first American vessel that ever passed from the upper lakes to that port.
      Buffalo Daily Courier
      Thursday, July 20, 1848

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Loss of the U.S. Steamer JEFFERSON. - An arrival at new York from Rio De Janiero reports that the U.S. surveying steamer Jefferfson was lost in July last at the mouth of the Straits. A portion of the machinery would be saved but the vessel will prove a total loss.
A schooner had been chartered at Montevideo, which has proceeded to the wreck to bring up the officers and crew. The Jefferson was an iron steamer built for the Government at Oswego during the Administration of Capt. Tyler. After serving at this port for some time as a Revenue cutter, she was taken down the St. Lawrence with another steamer of the same class under charge of Capt. Frazier, and went round to the Pacific.
      Oswego Daily Times
      August 16, 1851