"All around the Philippines on the east and south the water is from two to four thousand fathoms deep; so that if the seas were dried up around them, these islands would appear like a number of irregular chains of mountains, and the highest peak would be over 10,000 feet above the present surface of the water.
"From north to south these islands extend about a thousand miles, and from east to west about half that distance, with the Sulu or Mindoro Sea four hundred miles across it in either direction, nearly enclosed within them; for the north-east coast of Borneo is part of its boundary on the south. As the commander mentioned at dinner last evening, there are over two thousand islands in the group; and leaving out those rocks and shoals which are not big enough for a man to stand upon, there are twelve hundred of them.
"On a map of the world, or even of Asia, the Philippine Islands occupy but a small space, and in your school-days you have doubtless regarded them as of but little importance; but several of the islands are larger than any New England State, and two of them are as large as Virginia and Ohio, and nearly as large as New York and Pennsylvania. Luzon and Mindanao," and the professor pointed to them on the map, "the most northerly and the most southerly, have each about 40,000 square miles, and the area of all the islands is 116,000 miles. I think most of you could have no idea from your study of maps of the extent of the Philippines.
"Mindoro, the next island south of Luzon, has 9,000; and the others from 1,200 to 5,500. I shall not mention or describe them separately. We shall visit only Manila and the country near it, and you would not remember even the names of the islands over night. They are all mountainous and volcanic. The highest mountain is Apo, in Mindanao, which is 10,400 feet high, and there are others of 9,000 feet.
"The islands are volcanic, and therefore subject to earthquakes; and an instrument in Manila which indicates vibrations of the earth is said to be shaking about all the time. Several destructive ones are recorded in the past. In 1863 Manila was nearly destroyed by one, and the great southern island is especially liable to them.
"The mountain ranges mostly extend north and south; and there is space between them for some considerable rivers, as the Rio Grande in Luzon has a course of 220 miles. The Agusan in Mindanao is navigable for 60 miles. In this island are several lakes, with rivers flowing from them. In addition to which are many lacustrine basins."
"Spare us, Professor!" exclaimed Uncle Moses.
"The word comes from lacus, Latin for lake, and applies here to such lakes as send their overflow to the sea or other lakes by streams made by the rush of water. But I don't use many such words, and I hardly expected a classical scholar to object," replied the professor.
"But I objected in behalf of several here who never studied Latin; and besides the overflow is entirely apart from the root of the word. But I am satisfied, and the commander may invite you to proceed," chuckled Brother Avoirdupois.
"On account of the high mountains and the abundant sea-breezes, though hot and moist, this group is not so unhealthy as most tropical islands and countries. The fevers of hot countries are here of the mild, intermittent kind"—