The towers are five in number, built of hardest black granite, about 40 feet in diameter and 25 in height, and constructed so solidly as almost to resist absolutely the ravages of time. The oldest and smallest of the towers was constructed about 200 years since, when the Parsees first settled in Bombay, and is used only for a certain family. The next oldest was erected in 1756, and the three others during the next century. A sixth tower of square shape stands alone, and is only used for criminals. The writer proceeds as follows: Though wholly destitute of ornament and even of the simplest moldings, the parapet of each tower possesses an extraordinary coping, which instantly attracts and fascinates the gaze. It is a coping formed not of dead stone, but of living vultures. These birds, on the occasion of my visit, had settled themselves side by side in perfect order and in a complete circle around the parapets of the towers, with their heads pointing inwards, and so lazily did they sit there, and so motionless was their whole mien, that except for their color, they might have been carved out of the stonework. [Illustration: FIG. 3.--Parsee Towers of Silence (interior).] No one is allowed to enter the towers except the corpse-bearers, nor is any one permitted within thirty feet of the immediate precincts. A model was shown Mr. Williams, and from it he drew up this description: Imagine a round column or massive cylinder, 12 or 14 feet high and at least 40 feet in diameter, built throughout of solid stone except in the center, where a well, 5 or 6 feet across, leads down to an excavation under the masonry, containing four drains at right angles to each other, terminated by holes filled with charcoal. Round the upper surface of this solid circular cylinder, and completely hiding the interior from view, is a stone parapet, 10 or 12 feet in height. This it is which, when viewed from the outside, appears to form one piece with the solid stone-work, and being, like it, covered with chunam, gives the whole the appearance of a low tower. The upper surface of the solid stone column is divided into 72 compartments, or open receptacles, radiating like the spokes of a wheel from the central well, and arranged in three concentric rings, separated from each other by narrow ridges of stone, which are grooved to act as channels for conveying all moisture from the receptacles into the well and into the lower drains. It should be noted that the number “3” is emblematical of Zoroaster’s three precepts, and the number “72” of the chapters of his Yasna, a portion of the Zend-Avestá.