In this remarkable cave several distinctive features are presented. The central horizontal line is well defined by an overhanging ledge, from which hang some splendid stalactites. Several of them are of extraordinarily large size, elegant form, and delicate colour. One, of pure white, on the left-hand side of the cave, rests on the head of a sturdy stalagmite which has grown from the middle of a mass of rocks, sloping down to the base. A little to the right are two twin stalactites, caricatures of the stretched out scraggy legs of some very-long-cold-and-hungry man, and the most prominent central figures of the ledge are two conical pieces tapering off to fine points, like mammoth icicles. Above this ledge the formation of lime on the dark rugged wall and roof resembles fleecy clouds in an angry sky. Below, running back into the mountain, are the Crystal Cities, fenced in with corrugated sparkling walls coped with shell-formation. A little beyond is another wall of a similar kind, also gracefully curved in obedience to natural laws, for Nature loves curves and wages perpetual war against straight lines. In the distance are five or six other mural divisions. The central one is gracefully bent like the letter S, but not quite so much rounded at the ends. Between the outer wall and the rest is an open pear-shaped space, in which are four small domes and two conspicuous figures. The principal of these is "The Queen's Statue," a pleasing stalagmitic form of pure alabaster, about 20 inches in height, and standing on a pedestal of white, shading off to brown. It does not require much imaginative power to see in this image a representation of some royal personage clad in ermine robes. The proportions are good, and the pose is exceedingly graceful. Near to the Queen's Statue is another notable stalagmitic object, formed in three sections, indicating periods of rest between. First there is a foundation of white limestone formation. Then there is a columnar growth of a few inches, with a distinct joint between it and the base. Superposed is a dome-shaped summit, not unlike the back of a human head of that kind which phrenologists call "intellectual;" and between this and the lower portion is another well-defined joint at the nape of the neck. It is peculiar, but not regal, in appearance. The topographical aspect of the Crystal Cities is something like that presented by a bird's-eye view of a piece of country, in which everything is much foreshortened, as in the case of the Katoomba Colliery and mining township in the depths of the Kanimbla valley, when seen from a cliff 1,000 feet overhead. Giant eucalypti are dwarfed to the proportions of pot plants. Tall tree ferns resemble starfish. Stalwart workmen are reduced to pigmies, and the railway seems like the double line at the foot of an account in a ledger. The various walls in the cave are supposed to encompass separate cities. The old English idea of a "city" is an incorporated place, with