Alfred J. Hipkins and Kathleen Schlesinger, 1911 Encyclopædia Britannica, Volume 17… (1911)
“ The Egyptians always strung their lyres fan-shaped, like the modern Nubian kissar. Their paintings show three to eight or nine strings, but the painters’ accuracy may not be unimpeachable; the Berlin instrument had fifteen. The three-stringed lyre typified the three seasons of the Egyptian year—the water, the green and the harvest; the seven, the planetary system from the moon to Saturn. The Greeks had the same notion of the harmony of the spheres. There is no evidence as to what the stringing of the Greek lyre was in the heroic age. ”
