like the same extent of brilliant subterranean scenery anywhere else in these islands. The tourist portion of the cavern, a fraction of the whole, but yet a considerable extent of underground passages, is deservedly much frequented. The spacious vault, nicknamed the "House of Commons," vies in dimensions and dignity with those in the Peak of Derbyshire, but it is far surpassed by the "House of Lords." Seventeen massy columns of pure white stalactite, surmounting enormous cones of terraced stalagmite, tower from floor to roof of this impressive dome, some 140 feet in span and 70 feet high. The grandeur of its height is lost somewhat through the mountain of fallen blocks that rises from the entrance almost to the apex of the roof. Behind this vast accumulation a sort of ambulatory runs round under the walls, opening here and there into side chapels and irregular cavities, all bountifully adorned with the fairy-like work of the Limestone carbonate. The so-called "Tower of Babel" is a majestic pillar rising from the summit of a pyramidal mass of stalagmite, 40 feet in circumference, that being also the measure of its total height. A crowd of other Limestone freaks, some aptly and some incongruously nicknamed, and many extremely beautiful, are found in this chamber. The cavities and passages that lie to the north-east of the first great chamber are not often visited. They start from "Sadlier's Cave," which is not large but bewilderingly picturesque, and contains a superb pillar, "Lot's Wife," almost of the prodigious size of the "Tower." The "Kingston Gallery" is a straight rift, nearly 300 feet long, but only two or three feet wide, with sheets of snowy white sweeping down the walls, and breaking into whole garlands of scrolls and pennons and curtains, which in places have been thrown right across the gallery, dividing it into lofty cells. Manholes, actually, had to be cut through these diaphanous partitions to create a passage. From the cave at the end, a lower passage, the Sand Cave, comes back in a parallel direction to the point of junction, and from the quantities of fine sand on its bed, was evidently an important stream-course after the Kingston Gallery was drained of its waters. It has one unique feature, the succession of parallel rifts, called the "Closets," which are connected together by rents in their dividing walls. Some of these are extremely narrow, and by candlelight it is impossible to see any limit to their height, depth, or length. Similar widenings of the master joints and degradation of the Limestone separating them, are a special feature of the Mitchelstown Cave, and the key to its ground-plan, with its maze of right-angles.