The natives say that the first thing the guanionien does is to take out the eyes of the monkeys they catch. But there must be a fearful struggle, for these mondis are powerful beasts, and do not die at the eagle's will. There must be a great trial of strength; for if the monkey is not seized at an exact place on the neck, he can turn his head, and he then inflicts a fearful bite on the breast of the eagle, or on his neck or leg, which disables his most terrible enemy, and then both, falling, meet their death. I looked on without firing. The monkeys seemed paralyzed with fear when the eagle came down upon them, and did not move until after the bird of prey had taken one of their number, and then decamped. When I looked for them they had fled for parts unknown to me in the forest. I was looking so intently at the eagle and its prey that for a while I had forgotten the mondis. I do not wonder at it, for monkeys I could see often, but it is only once in a great while that such a scene as I witnessed could be seen by a man. It was grand; and I wondered not that the natives called the guanionien the leopard of the air. As I write these lines, though several years have passed away, I see still before me that big, powerful bird carrying its prey to some unknown part of the forest. Long after the time I have been speaking to you about, I was hunting in the forest, when I came to a spot where I saw on the ground more than a hundred skulls of various animals, and of monkeys of all sizes, from those of baby monkeys to those of large mandrills; and there were two or three skulls of young chimpanzees. What a ghastly sight it was! Some of these skulls seemed almost fresh; they were skulls of all the species of monkeys found in the forest. What could all this mean? I quickly perceived that these skulls were all scattered round a huge tree which rose higher than any of the trees surrounding it. Raising my eyes toward the top, I saw a huge nest made of branches of trees. I looked and looked in vain. I could not even hear the cries of any young birds. They had gone; they must have left their nest, and I wondered if they would come back at night with the _old folks_; so I concluded that I would lie in wait. I waited in vain. The sun set, and no guanionien; darkness came, and no guanionien. Then I took a box of matches from my hunting-bag, and set fire to a large pile of wood which I had made ready, and then I cooked a few plantains I had with me.