 In 1611 Hernandarias disembarked fifty heifers and some bulls in Lobos Island and reached an agreement with the natives to protect animals with calves.He repeated the operation in 1617 with another fifty animals and the same number in San Gabriel Island on the Colonia coast.This act originated a great cattle herd in the region, the exploitation of which was determinant in the historical processes lending to colonization of present day Uruguay, so far overlooked by Spaniards.