She was sailing from Bengal to Cadiz when an American-built and outfitted privateer with a letter of marque from the patriotic forces in Buenos Aires captured her in January 1817 in a sanguinary single-ship action during the Argentine War of Independence.

[4] Proudfoot presented petitions to the local authorities and the British consul pointing out that Tupac Amaru was the American brig Regent.

She had been purchased at New York and had been sailed to Baltimore where she was fitted out and armed, and recruited a crew entirely made up of Americans.

[6] Don David Cortes de Forest was an American, the former US Consul at Buenos Aires, and the owner of Tupac Amaru.

[9] The national cruiser brig Tupac Amaru, Captain Juan Magfudole, had captured Santo Christo on 1 September off Santa Maria, Terceira Island.

The cargo was transferred to Don David Cortes de Forest & Co.[10] This is the last readily accessible mention of Tupac Amaru.