American whaler Leander departed to sea in 1819

Of Nantucket, master Ariel Coffin, departed on 20th July towards the Pacific Ocean and returned in October 182 with 1.370 barrel sperm and 200 whale.

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