There was a narrow isthmus, formed by the sea of Verrazano, like that of Tehuantepec or Panama.
King Francis encouraged the ill-recorded and disputed voyages of the Florentine Giovanni da Verrazano in 1524, and the undoubted explorations of Jacques Cartier.
The claims of France to the possession of a great part of the northern half of America were based on the voyages of Verrazano and Cartier.
New York Bay and the Hudson river were discovered by Giovanni da Verrazano in 1524, and were probably seen by Estevan Gomez in 1525; for many years following French vessels occasionally ascended the Hudson to trade with the Indians.
In addition to numerous monographs and valuable contributions to Winsor's Narrative and Critical History of America, he published The Pre-Columbian Discovery of America by the Northmen (1868); The Northmen in Maine (1870); The Moabite Stone (1871); The Rector of Roxburgh (1871), a novel under the nom de plume of "William Hickling"; and Verrazano the Explorer; being a Vindication of his Letter and Voyage (1880).