The most easterly is the River of Tagoloan which has fourteen tributaries, the next is the River Cagayan with only three, then the River Capay with seven tributaries, all on the left bank.
Proceeding westward we come to the great and deep Lake of Lanao, described under the heading Moros, but which has never been surveyed, and then to the Gulf of Panguil, which, on the map, looks like a forearm and clenched fist, which nearly cuts Mindanao in two. The isthmus is only fourteen miles across in a straight line.
This was formerly a regular pirates’ track, over which they hauled their vessels, but it was till lately guarded by a chain of forts connected by a military road called the Trocha of Tucuran.
Two rivers running in a general direction from west to east and having between them a dozen tributaries, run into the Gulf of Panguil. The most northerly of the two is the Mipangi and the other is the Lintogo.
We now arrive at the peninsula of Sibuguey which I have likened to the tail of the skate. Around Lake Lanao there is an irregular loop of hills, and from the western end of this starts a cordillera which stretches right down the centre of the peninsula of Sibuguey and Zamboanga. A line drawn from Punta Sicayati (in the Dapitan excrescence) to the eastern shore of the Gulf of Dumanquilas will intersect a range of mountains which cross the Cordillera of Sibuguey nearly at right angles and with equal arms north and south. But the end of the northern arm bifurcates and throws out two ranges N.E. and N.W.
In the watershed thus formed three rivers take their rise, and have a general course from south to north but bearing a little to the westward. The easternmost of these is called the Dapitan, and runs into the bay of the same name. The next is the Dipolog, which runs into the sea west of Punta Sicayab; and the last is the Lubungan, running in about two leagues more to the west.
The other rivers in the peninsula are so unimportant that I do not enumerate them. Like those on the east coast they become raging torrents in the rainy season.
On the northern and southern coasts, which are more protected than the eastern, sheltered anchorages are to be found here and there, but no such fine natural harbours exist as abound in Southern Luzon. There is, however, less need for them, as it is very rare that the typhoons, which are so destructive in Luzon and the Visayas, cause damage in Mindanao, except at its northern and eastern corner. But for service on these coasts, vessels of a light draught of water are the most useful, as they can more easily find sheltered anchorage.
Mindanao is not nearly so unhealthy as is commonly supposed. Zamboanga and neighbourhood, Davao, Surigao, Talisay, and several other places, are really quite healthy for Europeans, if they take care of themselves.
Earthquakes are frequent. They would sometimes be destructive, but there is so little in the way of buildings to destroy. Divisions for Administrative Purposes.