American whaler Ontario departed to sea in 1820

Biodiversity Heritage Library

Of Nantucket, master Alexander D. Bunker, departed on 29 November 1820 to the Pacific Ocean, returned on 14 November 1823 1.940 barrels sperm oil 123 barrels whale oil.  

Source

Catalogue of Nantucket Whalers and their voyages from 1815 to 1870. Hussey&Robinson, Nantucket, 1876.