For the first mile of our passage we detected nothing whatever of a suspicious character; but upon rounding the eastern extremity of the island and entering the widest part of the lagoon we sighted two large canoes paddling furiously up the creek, about a mile ahead of us.  The captain at once brought his telescope to bear upon these craft, and with its aid discovered that each canoe was manned by about forty black paddlers, while the after end of each craft was occupied by some ten or a dozen men in European dress, most of whom appeared to be armed with muskets.  These men had the appearance of being either Portuguese or Spaniards, and their presence in such a spot could mean but one thing, namely, that there was a barracoon somewhere near at hand.  The skipper accordingly gave the order to chase the two canoes, to which the boats' crews responded with a cheer, and laid themselves down to their oars with such a will that they almost lifted the boats out of the water. But we had scarcely traversed a distance of half a dozen boats' lengths when, upon opening up a little indentation in the shore of the mainland, we saw before us a substantial wharf, long enough to accommodate two fair-sized craft at once, with a wide open space at the back of it upon which stood some eight or ten buildings, one of which was unmistakably a barracoon of enormous size.