Issac Operating out of New York, the Black Ball Line pioneered scheduled packet ship service to Liverpool, England in 1818, and the firm continued operating until it was dissolved in 1879. Its success resulted from focusing on the lucrative passenger trade, at a time when immigration to the United States was at its highest level.
In 1851, the massive three-deck packet Isaac Webb was the seventh and last Black Baller launched from the shipyard of famous New York shipbuilder William H. Webb, who also owned a 1/16 share of the ship. Named after the builder’s father, the Isaac Webb measured 185 feet in length and 1,359 tons. It made about four round trips per year between New York and Liverpool, England from 1851–1879. The average length of a passage was 37 days, with the shortest voyage recorded as 25 days.