Conquest of the Canary Islands 'Infierno' in the 1385 "Libro del Conoscimiento". During the 1370s, when Portugal and Castile were engaged in dynastic wars following the assassination of Peter I of Castile, Portuguese and Castilian privateers were dispatched against each other, several of which made detours to the Canary islands for shelter or slave-raiding jaunts. Ignoring the 1344 bull, Ferdinand I of Portugal granted (in 1370) the islands of Lanzarote and La Gomera to the adventurer 'Lançarote da Franquia' (believed by some to be none other than the impossibly-aged Lanceloto Malocello). This Lanzarote made an attempt to seize the islands and is reported to have
Lanzarote support of the King of Castile) came and fought the local Guanches, who were further decimated. The islands of Fuerteventura and El Hierro were later similarly conquered. In 1477, a decision by the royal council of Castile confirmed a grant of Lanzarote and Fuerteventura, with the smaller islands of Ferro and Gomera to the Castilian nobles Herrera, who held their fief until the end of the 18th century. In 1585, the Ottoman admiral Murat Reis temporarily seized Lanzarote. In the 17th century, pirates raided the island and took 1,000 inhabitants into slavery in Cueva de los Verdes. From 1730 to