the desired region and for any purpose desired therein, and shall not leave their course, unless compelled to do so by contrary weather.  They shall do this provided that, before crossing the said line, they shall not seize or take possession of anything discovered in his said region by the said King of Portugal; and should their said ships find anything before crossing the said line, as aforesaid, it shall belong to the said King of Portugal, and their Highnesses shall order it surrendered immediately.  And since it is possible that the ships and subjects of the said King and Queen of Castilla, Leon, etc., or those acting in their name, may discover within the next twenty days of this present month of June following the date of this treaty, some islands and mainlands within the said line, drawn straight from pole to pole, that is to say, inside the said three hundred and seventy leagues west of the Cabo Verde islands, as aforesaid, it is hereby agreed and determined, in order to remove all doubt, that all such islands and mainlands found and discovered in any manner whatsoever up to the said twentieth day of this said month of June, although found by ships and subjects of the said King and Queen of Castylla, Aragon, etc., shall pertain to and remain forever in the possession of the said King of Portugal and the Algarbes, and of his successors and kingdoms, provided that they lie within the first two hundred and fifty leagues of the said three hundred and seventy leagues reckoned west of the Cabo Verde islands to the above-mentioned line,—­in whatsoever part, even to the said poles, of the said two hundred and fifty leagues they may be found, determining a boundary or straight line from pole, to pole, where the said two hundred and fifty leagues end.  Likewise all the islands and mainlands found and discovered up to the said twenty days of this present month of June, by the ships and subjects of the said King and Queen of Castilla, Aragon, etc., or in any other manner, within the other one hundred and twenty leagues that still remain of the said three hundred and seventy leagues where the said bound that is to be drawn from pole to pole, as aforesaid, must be determined, and in whatever part of the said one hundred and twenty leagues, even to the said poles that they are found up to the said day, shall pertain to and remain forever in the possession of the said King and Queen of Castilla, Aragon, etc., and of their successors and kingdoms; just as whatever is or shall be found on the other side of the said three hundred and seventy leagues pertaining to their Highnesses, as aforesaid, is and must be theirs, although the said one hundred and twenty leagues are within the said bound of the said three hundred and seventy leagues pertaining to the said King of Portugal, the Algarbes, etc., as aforesaid. [163]

And if, up to the said twentieth day of this said month of June, no lands are discovered by the said ships of their Highnesses within the said one hundred and twenty leagues, and are discovered after the expiration of that time, then they shall pertain to the said King of Portugal as is set forth in the above.