Riferimento THACHER, John Boyd. CHRISTOPHER COLUMBUS, HIS LIFE, HIS WORK, HIS REMAINS: AS REVEALED BY ORIGINAL PRINTED AND MANUSCRIPT RECORDS, TOGETHER WITH AN ESSAY ON PETER MARTYR OF ANGHERA AND BARTOLOME DE LAS CASAS, THE FIRST HISTORIANS OF AMERICA. Londres, Inglaterra; Nova York, Estados Unidos: G. P. Putnam's Sons, 1903.