The officer of the fort was a lieutenant of infantry: one of that rank is stationed here for a month, after which he, with the garrison, consisting of three soldiers, are relieved, from Samboángan, where the Spaniards have three companies.
Samboangan is a convict settlement, to which the native rogues, principally thieves, are sent. The Spanish criminals, as I have before stated in speaking of Manilla, are sent to Spain.
The inhabitants of the island of Mindanao who are under the subjection of Spain, are about ten thousand in number, of whom five or six thousand are at or in the neighbourhood of Samboangan. The original inhabitants, who dwell in the mountains and on the east coast, are said to be quite black, and are represented to be a very cruel and bad set; they have hitherto bid defiance to all attempts to subjugate them. When the Spaniards make excursions into the interior, which is seldom, they always go in large parties on account of the wild beasts, serpents, and hostile natives; nevertheless, the latter frequently attack and drive them back.
The little fort is considered as a sufficient protection for the fishermen and small vessels against the pirates, who inhabit the island of Basillan, which is in sight from Mindanao, and forms the southern side of the straits of the same name. It is said that about seven hundred inhabit it. The name of Moor is given by the Spaniards to all those who profess the Mohammedan religion, and by such all the islands to the west of Mindanao, and known under the name of the Sooloo Archipelago, are inhabited.
The day we spent at Caldera was employed in surveying the bay, and in obtaining observations for its geographical position, and for magnetism. The flood tide sets to the northward and westward, through the straits, and the ebb to the eastward. In the bay we found it to run two miles an hour by the log, but it must be much more rapid in the straits.
At daylight on the 1st of February, we got under way to stand over for the Sangboys, [51] a small island with two sharp hills on it. One and a half miles from the bay we passed over a bank, the least water on which was ten fathoms on a sandy bottom, and on which a vessel might anchor. The wind shortly after failed us, and we drifted with the tide for some hours, in full view of the island of Mindanao, which is bold and picturesque. We had thus a good opportunity of measuring some of its mountain ranges, which we made about three thousand feet high.