The river Hydaspes was said to furnish a “musical stone.” When the moon was waxing, this stone gave forth a melodious sound.[2] This should be understood in the sense that when the stone was struck at that season the sound was different from what it was at other times—a fanciful idea based on some supposed sympathy between the stone and the moon. As moonstones are rarely larger than a silver dollar, they would not emit a sound upon being struck, and it is probably a rock known as “chinkstone” (phonolite) that is referred to, an igneous rock, very hard and resonant, that has been found in elongated and flat pebbles of large size; they ring with the resonance of bells when struck. A sonorous stone at Megara is reported by Pausanias[3]; when struck, it emitted the sound of the chord of a lyre. This was explained by the tale that, while helping Alcathous to build the walls of his city, the god Apollo had rested his lyre on the stone. The term sarcophagus is to us so clear and precise in its significance, that we do not stop to think that its etymology reveals it as literally meaning body-devourer. Tradition taught that a stone of this type was to be found near Assos in Lycia, Asia Minor, and also in some parts of the Orient. If attached to the body of a living person it would eat away the flesh. Another type, already noted by Theophrastus in the third century B.C., had the power of petrifying any object placed within receptacles made from it. If a dead person were buried in a “sarcophagus” of this material the body would not be consumed, but would, on the contrary, be turned to stone, even the shoes of the corpse and any utensils buried with it, would undergo a like wonderful change. Possibly actual observations of changes in the bodies of those long buried, their partial disintegration in some cases, and their hardening in others, may have given rise to the fancy that the stone receptacle in which they had reposed was directly the cause of this, whether it implied destruction or petrifaction.[4] Of the substance named galactite, Pliny gives some details. He states that it came from the Nile, was of the color and had the odor of milk, and when moistened and scraped produced a juice resembling milk. The liquid derived from the galactite when taken as a potion by nurses was said to increase the flow of milk. If a galactite were bound to a child’s arm the effect was to promote the secretion of saliva. To these favorable effects must be added an unfavorable one, namely, loss of memory, which was said to befall occasionally those who wore the stone. A kind of “emerald with white veinings” was sometimes called galactite, and another variety had alternate red and white stripes or veins.[5] Perhaps this “emerald” was a variety of jade, or a banded jasper.