Light of heart and foot they started.  Off to the left the great silver head of Orizaba looked down at them benignantly, and before them they saw the vast flowering robe of the tierra caliente into which they pushed boldly, even as Cortez and his men had entered it.

Ned was almost overpowered by a vegetation so grand and magnificent.  Except on the paths which they followed, it was an immense and tangled mass of gigantic trees and huge lianas.  Many of the lianas had wound themselves like huge serpents about the trees and had gradually pulled them, no matter how strong, into strange and distorted shapes.  Overhead parrots and paroquets chattered amid the vast and gorgeous bloom of red and pink, yellow and white.  Ned and Obed were forced to keep to the narrow peon paths, because elsewhere one often could not pass save behind an army of axes.

The trees were almost innumerable in variety.  They saw mahogany, rosewood, Spanish cedar and many others that they did not know.  They also saw the cactus and the palm, turned by the struggle for existence in this tremendous forest, into climbing plants.  Obed noted these facts with his sharp eye.

“It’s funny that the cactus and the palm have to climb to live,” he said, “but they’ve done it.  It isn’t any funnier, however, than the fact that the whale lived on land millions of years ago, and had to take to the water to escape being eaten up by bigger and fiercer animals than himself.  I’m a Maine man and so I know about whales.”

They came now and then to little clearings, in which the peons raised many kinds of tropical and semitropical plants, bananas, pineapples, plantains, oranges, cocoa-nuts, mangoes, olives and numerous others.  In some places the fruit grew wild, and they helped themselves to it.  Twice they asked at huts for the customary food made of Indian corn, and on both occasions it was given to them.  The peons were stolid, but they seemed kind and Ned was quite sure they did not care whether the two were Gringos or not.  Two or three times, heavy tropical rains gushed down in swift showers, and they were soaked through and through, despite their serapes, but the hot sun, coming quickly afterward, soon dried them out again.  They were very much afraid of chills and fever, but their constitutions, naturally so strong, held them safe.

Deeper and deeper they went into the great tropical wilderness of the tierra caliente.  Often the heat under the vast canopy of interlacing vines and boughs was heavy and intense.  Then they would lie down and rest, first threshing up grass and bushes to drive away snakes, scorpions and lizards.  Sometimes they would sleep, and sometimes they would watch the monkeys and parrots darting about and chattering overhead.  Twice they saw fierce ocelots stealing among the tree trunks, stalking prey hidden from the man and boy.  The first ocelot was a tawny yellow and the second was a reddish gray.  Both were marked with black spots in streaks and in lengthened rings.  The second was rather the larger of the two.  He seemed to be slightly over four feet in length, of which the body was three feet and the tail about a foot.