"We shall meet it on our way to the boat," was the reply. "It is a sort of sled or cart made by the Indians, and used for purposes of transportation, and it is drawn by a single buffalo. There are a couple of runners which curve so that their rear ends only rest on the ground, while the front of the vehicle is supported by the shafts. The frame and body of the pavava are of bamboo, and so are the shafts; the collar of the buffalo is of heavier wood, and the roof of the concern is of pandanus-leaves, over a frame of light bamboo. It is so light that a man can easily lift it, and it will hold as heavy a load as one buffalo can draw." Having acquired this information, the boys next wished to know something about the wild boar, and especially about those they had killed--whether they were to be considered first, second, or third class. On this subject the Doctor enlightened them. "The ones you have killed," said he, "are probably about two years old, and therefore are not first class. The boar does not attain his full size and strength till he is four years old; the proper classification is like this: first year, pig of the saunder, or briefly 'pig;' second year, hog of the second, or 'hog;' third year, hog-steer; and fourth year, and afterward, wild boar, or sanglier. You have killed a pair of 'hogs,' and very good ones they are. They probably weigh about two hundred pounds each, and when we get to Jala-jala we will put them on the Fairbanks scales we saw there yesterday, and see how far out I am in my guessing." Frank wished to know if these animals were natives of the Philippine Islands, or had been brought there from some other country. "The hog was originally unknown in a natural condition in America, Australia, and the Pacific islands," replied Doctor Bronson, "and his presence there is due to the early navigators, who turned pigs loose in the forests, and allowed them to shift for themselves. The Spaniards did so in the Philippines three hundred years ago, and it is to them that we owe the great number in the forests of Luzon. Those you have killed are descended from the original importations of the Spaniards, just as the wild hogs in the forests of South America, and on the many islands of the Pacific, are descended from those left by Captain Cook and other explorers." Fred asked how large these animals became when left to themselves for years in the forest.