Canary Islands La Gomera taking 1000 captives to be sold as slaves. Another noteworthy attack occurred in 1797, when Santa Cruz de Tenerife was attacked by a British fleet under Horatio Nelson on 25 July. The British were repulsed, losing almost 400 men. It was during this battle that Nelson lost his right arm. The sugar-based economy of the islands faced stiff competition from Spain's American colonies. Low prices in the sugar market in the 19th century caused severe recessions on the islands. A new cash crop, cochineal ("cochinilla"), came into cultivation during this time, saving the islands' economy. During this time
Conquest of the Canary Islands coalesced with these expeditions. La Gomera and El Hierro are depicted in the 1367 portolan of the brothers Domenico and Francesco Pizzigano. The Catalan Atlas of 1375 shows the Canaries almost completely and accurately mapped (only La Palma is missing). The eleven islands are named in the Catalan Atlas (from east to west) as "Graciosa" (La Graciosa),"laregranza" (Alegranza), "rocho" (Roque), "Insula de lanzaroto maloxelo" (Lanzarote), "insula de li vegi marin" (Lobos), "forteventura" (Fuerteventura), "Insula de Canaria" (Gran Canaria), "Insula del infernio" (Tenerife), "insula de gomera" (La Gomera), "insula de lo fero" (El Hierro). The name 'tenerefiz' is first given alongside