Seas Shipping Company, owner of the Robin Line was founded in 1920 in New York City, New York.
In 1933, the two families ended their partnership and became rivals.
The two companies remained rivals until the death of Arthur W. Lewis, Jr. in 1954.
During World War II Sword Line, Inc. was active with charter shipping with the Maritime Commission and War Shipping Administration.
The ship was run by its Seas Shipping Company crew and the US Navy supplied United States Navy Armed Guards to man the deck guns and radio.