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198 in extending the gospel, which was signally shown by their promotion of the voyage of Columbus, and enjoining upon them perseverance in the work, the Pope grants them full possession of all lands discovered and to be discovered, which are not under the dominion of Christian princes. "Further, because some of the kings of Portugal have acquired rights in parts of Africa through the Apostolic See, we grant you and your successors exactly the same rights just as fully as if here expressed in detail." It is clear from this passage that King John's attitude, and back of that, the earlier papal Bulls to Portugal, were the occasion of this appeal to the Pope.

In this first Bull there is no reference to any dividing line. The Spaniards can discover and hold any lands hitherto unknown and not in the possession of a Christian prince.

But no sooner was this Bull promulgated than it was superseded by another in which the unlimited grants and the whole passage of some twenty lines, referring to the previous grants to Portugal and bestowing the same rights on Spain in the newly discovered lands, were omitted. Humboldt remarked that only the Papal Archives could reveal the secret of that change in twenty-four hours. There is little reason now to expect light from that quarter.

It is possible that when the Bull of May 3 appeared the ambassador or some representative of King John protested, and declared that the rights of the king of Portugal were