On the twenty-sixth of September of the said year one thousand four hundred and ninety-three, the same supreme pontiff conceded to the Catholic Sovereigns, and their successors, besides the general concession of the Yndias, whatever conquest they might make in their name in the eastern, western, and southern islands, "provided they be not occupied by any other," etc., as is more fully shown in the original bull given in Rome on the sixth of October of the same year, and deposited in the Archives at Simancas.
These concessions made to the Catholic Sovereigns of Castilla and Leon and their successors, as well as that made to the Kings of Portogal, respecting the navigation of the East Indies, caused and still cause dispute and controversy between the kings of Castilla and those of Portugal, concerning the boundaries which should separate their navigation and discovery--the limit and bound which is to be drawn from pole to pole on this side of our hemisphere, and concerning the other bound and meridian line which is to be drawn in the hemisphere corresponding to the upper one.
Differences have existed and still exist between the kings concerning the line of demarcation which was to be drawn between their respective navigations and discoveries in this our hemisphere. The kings of Castilla claim that it was to be drawn according to the papal concession, one hundred leagues west of the islands of Acores and Cabo Verde; the kings of Portugal claim that it was to be drawn farther west, so that their side of the demarcation might include most of the coast of Brasil, and of that Tierra Firme [36] adjoining it. They agreed to settle this controversy, and the kings of Castilla consented to have the line of demarcation drawn two hundred and seventy leagues farther west than the line decreed in the bull of concession, as is set forth in a deed of agreement.
(In the original instrument, drawn on paper, the said year, in the presence of Fernand Alvarez of Toledo, secretary of the Catholic Sovereigns, and in the presence of Estevan Vaes, secretary of the king of Portogal, is found a confirmation by the Catholic Sovereigns. The said instrument, drawn on parchment, in Arevalo, on the second of July, 1495, is fully signed by the Sovereigns. The signature of the prince is found below. The instrument is countersigned by the said secretary. The seal was removed, but the cord to which it was attached remains. The confirmation of the said instrument of Tordesillas by King Don Joan of Portogal is attested by a contract written on five pages of parchment, signed by the king, and countersigned by Martyn de Veyra. The confirmation was given in Ebora on February 27, 1525)