in most american whalemen the mast-heads are manned almost simultaneously with the vessel’s leaving her port; even though she may have fifteen thousand miles, and more, to sail ere reaching her proper cruising ground. and if, after a three, four, or five years’ voyage she is drawing nigh home with anything empty in her—say, an empty vial even—then, her mast-heads are kept manned to the last; and not till her skysail-poles sail in among the spires of the port, does she altogether relinquish the hope of capturing one whale more.