Columbia subject headings:
Blackburn, Howard, 1859-1932.
Sailors--Massachusetts--Gloucester--Biography.
Seafaring life.
Harvard subject headings:
Blackburn, Howard, 1859-1932.
Sailors--Massachusetts--Gloucester--Biography.
Seafaring life
Voyages and travels
Princeton subject headings:
Blackburn, Howard, 1859-1932.
Voyages and travels.