She traded between Liverpool and the United States, all the while retaining American ownership though possibly with British registry.

It is not entirely clear how her owners dealt with the War of 1812.

Lloyd's List's ship arrival and departure data does show a voyage between Lisbon and Baltimore during that period.

Marcellus first appeared in Lloyd's Register (LR) in 1812.

[2] Marcellus, Ahorn, master, wrecked on 13 August 1820 on Saugor Island, in the River Hooghly.