 During this period, Carvajal continued his business dealings by trading in slaves and cochineal.In 1578, after obtaining an endorsement from the viceroy and the Audiencia de México for his desire to be granted an important official charge by the king he went to Spain.After lengthy negotiations in the Consejo de Indias, on 31 May 1579 he succeeded in obtaining his desired post, and was awarded a large territory that was to be named Nuevo Reino de León.