Launched in 1907 from Philadelphia, Pennsylvania, the steel-hulled Lizzie D began life as a coastal tug.  Her job description changed to "rum running" when the National Prohibition Act passed in 1919.  Demand for alcohol soared, and many vessels were pressed into smuggling service. <P>Rum running was a popular method of importing illegal whiskey.  These vessels would steam offshore, take a load of liquor from a larger ship, and return to sell the cargo at a large profit to Rum Row operators.  The 84-foot Lizzie D sank during one of these excursions in the fall of 1922.  The cause of the tragedy was never determined.