American whaler William Penn departed to sea in 1817

Brig. Of Nantucket, master Peter Coffin, departed on 6 March 1817 towards the South Atlantic Ocean and returned on 11 March 1818 with 170 barrels sperm and 324 barrels whale.

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