When I opened my eyes again it was night, and doubtless I should have slept on through many hours more had it not been for a dreadful itch and pain that took me in every part, till at length I sprang up and cursed in my agony. At first I was at a loss to know what occasioned this torment, till I perceived that the air was alive with gnat-like insects which made a singing noise, and then settling on my flesh, sucked blood and spat poison into the wound at one and the same time. These dreadful insects the Spaniards name _mosquitoes_. Nor were they the only flies, for hundreds of other creatures, no bigger than a pin’s head, had fastened on to me like bulldogs to a baited bear, boring their heads into the flesh, where in the end they cause festers. They are named _garrapatas_ by the Spanish, and I take them to be the young of the tic. Others there were, also, too numerous to mention, and of every shape and size, though they had this in common, all bit and all were venomous. Before the morning these plagues had driven me almost to madness, for in no way could I obtain relief from them. Towards dawn I went and lay in the water, thinking to lessen my sufferings, but before I had been there ten minutes I saw a huge crocodile rise up from the mud beside me. I sprang away to the bank horribly afraid, for never before had I beheld so monstrous and evil-looking a brute, to fall again into the clutches of the creatures, winged and crawling, that were waiting for me there by myriads. But enough of these damnable insects! CHAPTER XIII THE STONE OF SACRIFICE At length the morning broke and found me in a sorry plight, for my face was swollen to the size of a pumpkin by the venom of the mosquitoes, and the rest of my body was in little better case. Moreover I could not keep myself still because of the itching, but must run and jump like a madman. And where was I to run to through this huge swamp, in which I could see no shelter or sign of man? I could not guess, so since I must keep moving I followed the bank of the river, as I walked disturbing many crocodiles and loathsome snakes. Now I knew that I could not live long in such suffering, and determined to struggle forward till I fell down insensible and death put an end to my torments.