The negro Filippe and Benedicto were really brave in a way. I tried to induce them all the time to march as much as we could, so as to get somewhere; but every few moments they sat or fell down, and much valuable time was wasted.
In a way it was amusing to watch them—poor Benedicto particularly, who every few minutes would take out a little pocket looking-glass to gaze at his countenance.
"Am I not thin?" he would ask me a dozen times a day. "I have never been so thin before. If I had not come with you I should not be so thin. It is all because we have no food that I am so thin.... If I had not met you I would never have been so thin!"—and so on all day.
I reminded him that when we were travelling on the river he had complained of baling the water out of the canoe and preferred to travel overland; now that we were travelling overland he had a new complaint to make. It was quite unreasonable. He was not the only one to get thin; we were all getting thin.
Benedicto greatly objected to carry the 15 lb. weight of glass negatives, but he did not mind at all carrying a lot of useless things of his own, which weighed an extra 20 lb. or so!
Since my return I have been constantly asked why, when we were starving, we did not eat the grass in the forest; why we did not feed on the leaves or roots of the trees? If we could find no fruit, why did not we eat monkeys or birds or other animals? why did not we dig for worms and feed on them?
As I have already stated, there were no worms in the forest because of the ants, which allow no insect to be underground near the surface. As for the grass, it takes no very intelligent person to see that it cannot exist under the trees of the tropical forest. If a few blades of grass are to be found on the edge of streamlets it does not follow that you can eat them. That grass is usually poisonous. The same may be said of the leaves and roots of trees, even admitting that you could reach the former—which is not the case, as the leaves are usually at a great height upon the trees, and when you are starving you have not the strength to climb up. It also follows that where there is no edible fruit there can be no birds or monkeys, as animals generally have enough sense not to settle where there is nothing to eat.
Again, even allowing that some rare trees, the fruit of which was edible, were to be found, it does not do to lose sight of the fact that you may be passing under that tree at the season when it is not bearing fruit, as fruit-trees, even in tropical countries, do not always bear fruit at a time to suit the convenience of the passing traveller.
As I have said, the country we were traversing was there hilly and rocky, and we were cutting across the headwaters of numerous tributaries, first of the Tapajoz River, then of the Madeira River—the tiny watercourses, most of them only a few inches wide, descending in numerous successive small cascades over rocks—therefore no fish was to be found. When we did find it in the big rivers we had no way to catch it.
It then again follows, concerning the country between great rivers, that where there is no fish, no game, no fruit, no vegetables, and no possible way of cultivating the land, there can be no inhabitants. That was why the great Brazilian forest in that region was uninhabited by human beings.