Black Ball Line (trans-Atlantic packet)

The Black Ball Line (originally known as the Wright, Thompson, Marshall, & Thompson Line, then as the Old Line) was a passenger line founded by a group of New York Quaker merchants headed by Jeremiah Thompson, and included Isaac Wright & Son (William), Francis Thompson and Benjamin Marshall. All were Quakers except Marshall.

The line initially consisted of four packet ships, the Amity, Courier, Pacific and the James Monroe. All of these were running between Liverpool, England and New York City. This first scheduled trans-Atlantic service was founded in 1817. In operation for some 60 years, it took its name from its flag, a black ball on a red background.