A long-lost vessel from the 1800s was found by accident as NOAA tested equipment
cnn.com
cnn.com
So this could have been 1) from the war of 1812 2) US or British operations against Caribbean pirates in the 1820s 3) a slaver, captured by British or US naval forces anytime after the war of 1812 4) a Union vessel captured by Confederate forces or a blockade runner captured by Union forces during the Civil War.
as in a privateer that lost so badly it sunk, most hands lost and no one (because privateer) recorded much about it.