We imagine that we know a matter when we are acquainted with the doer of it and the end for which he did it. And since in former chapters we have set forth the Lord Infant as the chief actor in these things, giving as clear an understanding of him as we could, it is meet that in this present chapter we should know his purpose in doing them. And you should note well that the noble spirit of this Prince, by a sort of natural constraint, was ever urging him both to begin and to carry out very great deeds. For which reason, after the taking of Ceuta he always kept ships well armed against the Infidel, both for war, and because he had also a wish to know the land that lay beyond the isles of Canary and that Cape called Bojador, for that up to his time, neither by writings, nor by the memory of man, was known with any certainty the nature of the land beyond that Cape. Some said indeed that Saint Brandan had passed that way; and there was another tale of two galleys rounding the Cape, which never returned. But this doth not appear at all likely to be true, for it is not to be presumed that if the said galleys went there, some other ships would not have endeavoured to learn what voyage they had made.