WILLIAMS & GUION.

The Williams & Guion flag is blue with a white lozenge bearing a black star, commonly shown with five points but sometimes six. An 1856 Currier & Ives print of Adelaide, built in 1854, shows the blue-and-white flag on the Liverpool–New York route. This vessel is expressly distinct from City of Adelaide, built in 1864.

Loughran records W274 as an alternative given by some authorities but regards it as doubtful, specifying a six-pointed star as for Guion & Co.

Mystic Seaport dates its W273 reference to 1850, as it does W272. The same note calls a six-pointed-star reference W168; that identifier is not silently reassigned.