Yten [Item]:  [161] the said representatives promise and affirm by virtue of the powers aforesaid, that from this date no ships shall be despatched,—­namely as follows:  the said King and Queen of Castilla, Leon, Aragon, etc., for this part of the bound, and its eastern side, on this side the said bound, which pertains to the said King of Portugal and the Algarbes, etc.; nor the said King of Portugal to the other part of the said bound which pertains to the said King and Queen of Castilla, Aragon, etc.,—­for the purpose of discovering and seeking any mainlands or islands, or for the purpose of trade, barter, or conquest of any kind.  But should it come to pass that the said ships of the said King and Queen of Castilla, Leon, Aragon, etc., on sailing thus on this side of the said bound, should discover any mainlands or islands in the region pertaining, as above said, to the said King of Portugal, such mainlands or islands shall pertain to and belong forever to the said King of Portugal and his heirs, and their Highnesses shall order them to be surrendered to him immediately.  And if the said ships of the said King of Portugal discover any islands and mainlands in the regions of the said King and Queen of Castilla, Leon, Aragon, etc., all such lands shall belong to and remain forever in the possession of the said King and Queen of Castilla, Leon, Aragon, etc., and their heirs, and the said King of Portugal shall cause such lands to be surrendered immediately.

Yten:  In order that the said line or bound of the said division may be made straight and as nearly as possible the said distance of three hundred and seventy leagues west of the Cabo Verde islands, as hereinbefore stated, the said representatives of both the said parties agree and assent that within the ten months immediately following the date of this treaty, their said constituent lords shall despatch two or four caravels, namely, one or two by each one of them, a greater or less number, as they may mutually consider necessary.  These vessels shall meet at the island of Grande Canaria [Grand Canary Island] during this time, and each one of the said parties shall send certain persons in them, to wit, pilots, astrologers, sailors, and any others they may deem desirable.  But there must be as many on one side as on the other, and certain of the said pilots, astrologers, sailors, and others of those sent by the said King and Queen of Castilla, Aragon, etc., and who are experienced, shall embark in the ships of the said King of Portugal and the Algarbes; in like manner certain of the said persons sent by the said King of Portugal shall embark in the ship or ships of the said King and Queen of Castilla, Aragon, etc.:  a like number in each case, so that they may jointly study and examine to better advantage the sea, courses, winds, and the degrees of the sun or of north latitude, [162] and lay out the leagues aforesaid, in order