American whaler William Penn departed to sea in 1818

Of Nantucket, master Benjamin Folger, departed on 29 May 1818 towards the Cape of Good Hope, South Africa and returned on 12 February 1819 with 38 barrels sperm and 639 barrels whale. Brig.

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