The two masted wooden brigantine H.R. Seymour was built in the year 1847 by the ship builder Asa Wilcox at the Three Mile Bay ship yard located in the tiny hamlet of Three Mile Bay near Sacketts Harbor and Chaumont, New York. In both 1861 and 1863 the vessel was valued at $1,500 and rated C2. She had no official number.

July, 1852: The H.R. Seymour got on a shoal in the Straits Of Mackinaw, she jetted 30 tons of iron to get off.

November, 1852: Went ashore and sunk with a load of 11,000 bushels of wheat and $400 worth of whiskey at Rattlesnake Island.

May, 1853: Raised by a steam tug and light damage repaired at Put-In-Bay, Ohio.

1854: Lost all spars during a storm on Lake Huron. Later repaired at Detroit, Michigan.

September, 1855: Went ashore with a load of corn on North Manitou.

Last Document Of Enrollment: Chicago: 4/17/1865.
Between April and June of 1866, the brig H.R. Seymour was brought to Manitowoc, Wisconsin to be rebuilt. The vessel was dismantled instead and her hull burned for the iron. Subsequently, her iron and rigging were used in the building of a scow schooner at Neshoto that same year.