While the precious and semi-precious stones were often worn as amulets or talismans, the belief in the magic quality of mineral substances was not confined to them, but was also held in regard to large stone masses of peculiar form, or having strange markings or indentations; moreover, many small stones, possessing neither worth nor beauty, were thought to exert a certain magical influence upon natural phenomena. An occult power of this sort was also attributed by tradition to some mythical stones, the origin of this fancy being frequently explicable by the quality really inherent in some known mineral bearing a designation closely similar to that bestowed upon the imaginary stone. To certain stones has been attributed the power to produce musical tones, the most famous example being the so-called “Vocal Memnon” of Thebes. This colossal statue was said to emit a melodious sound when the sun rose, and according to Greek legend this sound was a greeting given by Memnon to his mother, the Dawn. It appears, however, that the statue was a respecter of persons, for when the Emperor Hadrian presented himself before it, he is said to have heard the sound three times, whereas common mortals heard it but once, or at most twice, while occasionally the statue withheld its greeting altogether. A modern traveller relates a personal experience that may cast a side-light upon this matter. His visit to Thebes was made in the evening, but a fellah who was standing near the statue asked him whether he wished to hear the musical sound. Of course the reply was in the affirmative. Thereupon the man climbed up the side of the colossal figure and hid himself behind the elbow. In a moment sharp metallic sounds became audible; not a single sound, but several in succession. Knowing from their quality that they could not proceed from the stone, the traveller asked his donkey-boy for an explanation and was told that the man was striking an iron bar. In ancient times the priests probably performed this or a similar trick in a much more skilful way than did the poor fellah, so that the mystery of the statue was carefully guarded.[1]