Numerous as the icebergs of the antarctic regions are, they have as yet afforded few examples of transported materials. One, however, of very considerable interest, is thus recorded in a Journal of Discoveries in the Antarctic Ocean in 1839, by Mr John Balleny, communicated to the Geographical Society by Mr Enderby, the ship-owner. “March 13. Light variable winds from the eastward; surrounded by icebergs. In latitude 61 degrees, longitude 103 degrees 40 minutes, passed within a quarter of a mile of an iceberg about 300 feet high, with a block of rock attached to it.” The rock is described as about 12 feet in height and about one-third up the berg. The nearest certainly known land (Enderby’s Land) was distant from the spot 1400 miles; Sabrina Land, if such exists, was distant 450 miles; and it is very improbable that any land will be discovered within 100 miles. Mr Darwin, in an interesting note on this Journal, mentions a preceding case of an iceberg with a considerable block lying on it, seen east of South Shetland by Mr Sorrell, when in a sealing vessel; and though another voyager, Captain Briscoe, during several cruises in the antarctic seas, had never once seen a piece of rock in the ice, he remarks, that if but one iceberg in a thousand or in ten thousand transports its fragment, the bottom of the antarctic sea and the shores of its islands must already be scattered with masses of foreign rock, the counterpart of the erratic boulders of the northern hemisphere. Such, then, are the facts on which modern geologists, and more especially Mr Lyell, have founded the theory of ice-transported boulders, appealing to the experience of that which is now occurring in existing seas as evidence of that which did occur in seas not now existing--seas which once covered or at least rose to the level of places which exhibit these relics of their presence. Presuming, then, for an instant, that the fact is conceded, that at some ancient epoch the low lands of a large portion of the northern and southern hemispheres were under water, whilst the higher hills and mountains were covered with snow, and their gorges and valleys filled with glaciers, which on descending to the ocean carried with them fragments of rocks, and became as icebergs their carriers to distant regions, do we not obtain an explanation of the phenomena of boulders more simple and rational than any of those previously advanced? For example, Kirwan in his Essays tells us that the Bay of Galway must have been occupied by a granitic mountain, which in a great catastrophe was shattered and swallowed up, because he found a mass of granite called “the Gregory” on one of the isles of Arran, 100 feet above the sea, and 8 or 10 miles from the nearest granitic locality, the islands themselves being limestone. But such a mass, though 20 feet long, 10 high, and 11 broad, if floated across on an iceberg, could have been deposited at its destined place by machinery more simple than such a catastrophe.