and all was dry and incoherent above, the tones were loudest and sharpest, and most easily evoked by the foot. Our discovery,--for I trust I may regard it as such,--adds a third locality to two previously known ones, in which what may be termed the musical sand,--no unmeet counterpart to the "singing water" of the tale,--has now been found. And as the island of Eigg is considerably more accessible than _Jabel Nakous_, in Arabia Petraea, or _Reg-Rawan_, in the neighborhood of Cabul, there must be facilities presented through the discovery which did not exist hitherto, for examining the phenomenon in acoustics which it exhibits,--a phenomenon, it may be added, which some of our greatest masters of the science have confessed their inability to explain. _Jabel Nakous_, or the "Mountain of the Bell," is situated about three miles from the shores of the Gulf of Suez, in that land of wonders which witnessed for forty years the journeyings of the Israelites, and in which the granite peaks of Sinai and Horeb overlook an arid wilderness of rock and sand. It had been known for many ages by the wild Arab of the desert, that there rose at times from this hill a strange, inexplicable music. As he leads his camel past in the heat of the day, a sound like the first low tones of an Aeolian harp stirs the hot breezeless air. It swells louder and louder in progressive undulations, till at length the dry baked earth seems to vibrate under foot, and the startled animal snorts and rears, and struggles to break away. According to the Arabian account of the phenomenon, says Sir David Brewster, in his "Letters on Natural Magic," there is a convent miraculously preserved in the bowels of the hill; and the sounds are said to be those of the "_Nakous_, a long metallic ruler, suspended horizontally, which the priest strikes with a hammer, for the purpose of assembling the monks to prayer." There exists a tradition that on one occasion a wandering Greek saw the mountain open, and that, entering by the gap, he descended into the subterranean convent, where he found beautiful gardens and fountains of delicious water, and brought with him to the upper world, on his return, fragments of consecrated bread. The first European traveller who visited _Jabel Nakous_, says Sir David, was M. Seetzen, a German. He journeyed for several hours over arid sands, and under ranges of precipices inscribed by mysterious characters, that tell, haply, of the wanderings of Israel under Moses. And reaching, about noon, the base of the musical fountain, he found it composed of a white friable sandstone, and presenting on two of its sides sandy declivities. He watched beside it for an hour and a quarter, and then heard, for the first time, a low undulating sound, somewhat resembling that of a humming top, which rose and fell, and ceased and began, and then ceased again; and in an hour and three quarters after, when in the act of climbing along the declivity, he heard the sound yet louder and