"And here let me give you a few figures about the salt-mines of Wieliczka. I cannot promise that they are entirely accurate, but they are drawn from the best sources within our reach. Some were obtained from the under-officials of the mines who accompanied us, and others are taken from the work of previous writers on this subject. "The salt-mine may be fairly regarded as a city under the surface of the earth, as it shelters about a thousand workmen, and contains chapels, churches, railways, stables, and other appurtenances of a place where men dwell. In fact it is a series of cities, one above the other, as there are four tiers of excavations, the first being about two hundred feet below the surface, and the lowest nearly two thousand. The subterranean passages and halls are named after various kings and emperors who have visited them, or who were famous at the time the passages were opened, and altogether they cover an area of several square miles. In a general way the salt-mines of Wieliczka may be said to be nearly two miles square; but the ends of some of the passages are more than two miles from the entrance of the nearest shaft. The entire town of Wieliczka lies above the mines which give occupation to its inhabitants. [Illustration: AN UNDERGROUND CHAPEL.] "There is probably more timber beneath the surface at Wieliczka than above it, as the roofs of the numerous passages are supported by heavy beams; and the same is the case with the smaller halls. In the larger halls such support would be insufficient, and immense columns of salt are left in position. In several instances these pillars of salt have been replaced by columns of brick or stone, as they would be liable to be melted away during any accidental flooding of the mine, and allow the entire upper strata to tumble in. This has actually happened on one occasion, when a part of the mine was flooded and serious damage resulted. "Our guide said the length of the passages, galleries, and halls was nearly four hundred English miles, and the greatest depth reached was two thousand four hundred feet. If we should visit all the galleries and passages, and examine every object of interest in the mines, we should be detained there at least three weeks. Not a single one of all the workmen had been in every part of all the galleries of the mine, and he doubted if there was any officer attached to the concern who would not be liable to be lost if left to himself.