sentences:  A Spanish fleet led by Pedro Menéndez de Avilés caught up to him as he was getting back to La Rochelle and killed him at sea.Some sources say this fatal encounter occurred in 1549.His writings were published as "Les voyages avantureux du Capitaine Ian Alfonce" (1559), the "Rutter of Jean Alphonse" (1600) and "La cosmographie avec l’espère et régime du soleil du nord par Jean Fonteneau dit Alfonse de Saintonge, capitaine-pilote de François Ier" (1904).