Ferdinand De Soto, The Discoverer of the Mississippi is a classic biography of the great Spanish explorer, Ferdinand De Soto. Mr. Theodore Irving, in his valuable history of the "Conquest of Florida," speaking of the astonishing achievements of the Spanish Cavaliers, in the dawn of the sixteenth century says: "Of all the enterprises undertaken in this spirit of daring adventure, none has surpassed, for hardihood and variety of incident, that of the renowned Ferdinand de Soto, and his band of cavaliers. It was poetry put in action. It was the knight-errantry of the old world carried into the depths of the American wilderness.