"Why are you collecting this fat? Is it a prophet of some new dish in preparation?"
"No; but I intend inspecting the cave, and with this grease we shall be able to make a lamp, which will be more than useful."
I approved of Sumichrast's idea, and, as he had discovered a colony of moles, proposed to go after dinner and catch some of them, so as to increase our supply of light. Besides, I hoped that in this walk we should meet with some kind of resinous tree, the branches of which might serve as torches. Lucien could hardly restrain his joy, and wished to penetrate into the cave without further delay. He scarcely gave himself time enough to eat, and scolded l'Encuerado for being so slow, which was an indirect mode of asking us to hurry.
Having again reached the forest, we searched for a pine or a fir, the branches of which, being full of resin, would have enabled us to show more mercy to the moles. Hearing us mention these two trees, Lucien wanted to know the difference between them.
"They both belong to the Coniferous family," replied Sumichrast; "but firs generally grow upon lofty mountains far inland, while pines abound on sea-coasts, the shifting, sandy soil of which is, after a time, consolidated and fertilized by them."
Sumichrast's explanation still left much wanting; I saw this from Lucien's numerous questions; but without seeing a specimen of each tree it would have been difficult to better describe their peculiar characteristics.
After a long and unsuccessful walk, we halted in front of a guaiac-tree with dark-green foliage, a higher tree than any we had before met with. This fine member of the Rutacean family was covered with pale-blue flowers. It produces a gum used especially by the English in the preparation of tooth-powder; but the hardness of its wood, which would have blunted our weapons, induced me to pass it by. A little farther on, l'Encuerado spied out a liquid-amber tree, valuable on account of the balsam that oozes from its branches when cut, which is burned by the Indians as incense. He climbed the knotty trunk of this colossus, and cut off some branches, which Sumichrast split into small pieces, after I had cleared off their leaves. Our work was interrupted by the approach of night, and we made our way to our bivouac, each loaded with a heavy fagot.
As soon as we arrived, Lucien had the satisfaction of trying one of our flambeaux. The branch crackled when lighted, and, as we entered the cavern, five or six bats flew out. I led Lucien by the hand, and very soon he was the only one who could stand upright. Afterwards we entered a vast chamber with a dome-shaped roof, which became lower the farther we penetrated; this was rather a disappointment, as we had fancied there was something more to be seen than a mere cave. A heap of reddish earth in one corner attracted Sumichrast's attention, who examined it to see if he could discover some fossil bones. Standing all together, we must have formed, by the smoky light of our odoriferous torches, rather a fantastic-looking group. More than half an hour elapsed without discovering any results from our digging. L'Encuerado, who had tried to crawl in between the roof and the ground, suddenly raised an exclamation; he had, in fact, all but fallen into a deep pit. In an instant I was laid down flat on my stomach and crawling towards the Indian; Lucien, owing to his size, was able to creep on his hands and feet, and consequently soon got in front of me. We could soon see down into the bottom of the hole; the burning fragments of our torches fell upon a heap of stones at a depth of twelve or fifteen feet. L'Encuerado threw one of the torches into the chasm, and the vague glimmer showed us a yawning opening on the left. Delighted with this discovery, we now beat a retreat, deferring a more thorough exploration until the next day.
The night was dark, and during our absence the fire had almost gone out. Just below us, a tree, the outline of which we could scarcely distinguish, seemed covered with animated sparks. Lucien opened his eyes very widely indeed, not being in the least able to understand this phenomenon, which was produced by thousands of elaterides, insects which have on each side of the thorax a yellowish spot which becomes luminous in the dark.
Nothing could be more curious than to see innumerable glittering spots rising, falling, and crossing one another with extraordinary rapidity; one might have fancied it a tree bearing flowers of fire waving about in the breeze. L'Encuerado came up with a specimen, which lighted up his hand with a greenish glimmer. Lucien took possession of it, and the two luminous spots looked to him like two enormous eyes. Suddenly the insect gave a kind of shock to the boy's fingers, who looked at us full of surprise.