The chapter explores how the production of cosmographical knowledge and acts of self-fashioning interacted in negotiations over royal capitulaciones, which were contracts between the Crown and private individuals that permitted the latter to act on the Crown’s behalf in matters such as exploration. After a brief discussion of prior Spanish efforts to reach Asia, the chapter then concentrates on the legal cases that were argued and decided during the 1530s and early 1540s concerning the right to explore the regions in the Pacific Northwest and who was to be recognized as the discoverer (descubridor) of this part of the world. The analysis presented here shows how the efforts of Hernán Cortés, Viceroy Antonio de Mendoza, and others to prove they deserved to be recognized as discoverers had an impact on the mapping of the Pacific Northwest and left deep marks on the laws of the Indies.