It was at the mouth of one of these entrances to the mines that I got my first definite notion of what sulphur miners look like--those unfortunate creatures who wear out their lives amid the poisonous fumes and the furnace heat of these underground hells. There was a rumble of a car, and presently a man, almost stark naked, stepped out of the dark passageway. He was worn, haggard, and gray, and his skin had a peculiar grayish-white tinge. He spoke in a husky whisper, but I do not know whether that is one of the characteristic effects of the work in the mines or not. I was told that, in addition to other dangers, the sulphur has a bad effect upon the lungs. It was explained to me that the sulphur dust gets into the lungs and clogs them up, and that is what accounts for the groans of the _carusi_, so frequently spoken of, when they are tugging up the steep and winding passageways with the heavy burdens of crude ore on their backs. It had been many years since I had been in a mine, but as I entered the dark, damp gallery and felt the sudden underground chill, the memories of my early experiences all came back to me. As we got farther into the mine, however, the air seemed to grow warmer. Suddenly a door at the side of the gallery opened; a blast of hot air, like that from a furnace, burst out into the corridor, and another of those half-naked men, dripping with perspiration, stepped out. We passed at intervals along the main corridor a number of these doors which, as I discovered, led down into parts of the mine where the men were at work. It seemed incredible to me that any one could live and work in such heat, but I had come there to see what a sulphur mine was like, so I determined to try the experiment. The side passage which I entered was, in fact, little more than a burrow, twisting and winding its way, but going constantly deeper and deeper into the dark depths of the earth. I had known what it was to work deep down under the earth, but I never before so thoroughly realized what it meant to be in the bowels of the earth as I did while I was groping my way through the dark and winding passages of this sulphur mine. It is down at the bottom of these holes, and in this steaming atmosphere, that the miners work. They loosen the ore from the walls of the seams in which it is found, and then it is carried up out of these holes in sacks by the _carusi_.