Other letters from Mr. Layard of a later date than that just mentioned, announce new discoveries. "Another mine has been opened at Nimroud; and every stroke of the pick-axe brings new wonders to light." Old Nineveh, whose very existence had become little better than a vague historic dream, is astonishing the world by her buildings her sculptures, and her many thousands of inscriptions, which have been brought to light by the explorations of Mr. Layard.[88] "He has opened fourteen chambers and uncovered two hundred and fifty sculptured slabs. The grand entrance previously described led him into a hall above two hundred and fifty feet long and thirty broad--entirely built of slabs of marble covered with sculptures. The side walls are ornamented with bas-reliefs of the highest interest--battles, sieges, lion-hunts, &c.; many of them in the finest state of preservation, and all executed with extraordinary spirit. They afford a complete history of the military art of the Assyrians; and prove their intimate knowledge of many of those machines of war, whose invention is attributed to the Greeks and Romans--such as the battering ram, the tower moving on wheels, the catapult, &c. Nothing can exceed the beauty and elegance of the forms of various arms, swords, daggers, bows, spears, &c. In this great hall are several entrances, each formed by winged lions, or winged bulls.[89] These lead to other chambers; which again branch off into a hundred ramifications. Every chamber is built of marble slabs covered with sculptures or inscriptions." The excavations thus far only extend to one corner of a great mound, the largest on the plain, measuring about one thousand eight hundred feet by nine hundred. The wonders that may be brought to light from a more complete survey of this vast heap of ruins, will be looked forward to with intense interest.