American whaler General Jackson departed to sea in 1820

Made by John Heaviside Clark (circa 1771-1863) Flensing in progress around 1814

Of Nantucket, master John Fisher, departed on 11 October 1820 to the Pacifc Ocean, returned on 6 July 1823 860 barrels sperm oil.

Source

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