The pious founder of the Moravian brotherhood, the Count of Zinzendorf, owed his life on one occasion to this deeply rooted superstition. He was visiting a missionary station among the Shawnees, in the Wyoming valley. Recent quarrels with the whites had unusually irritated this unruly folk, and they resolved to make him their first victim. After he had retired to his secluded hut, several of their braves crept upon him, and cautiously lifting the corner of the lodge, peered in. The venerable man was seated before a little fire, a volume of the Scriptures on his knees, lost in the perusal of the sacred words. While they gazed, a huge rattlesnake, unnoticed by him, trailed across his feet, and rolled itself into a coil in the comfortable warmth of the fire. Immediately the would-be murderers forsook their purpose and noiselessly retired, convinced that this was indeed a man of God. A more unique trait than any of these is its habit of casting its skin every spring, thus as it were renewing its life. In temperate latitudes the rattlesnake, like the leaves and flowers, retires from sight during the cold season, and at the return of kindly warmth puts on a new and brilliant coat. Its cast-off skin was carefully collected by the savages and stored in the medicine bag as possessing remedial powers of high excellence. Itself thus immortal, they thought it could impart its vitality to them. So when the mother was travailing in sore pain, and the danger neared that the child would be born silent, the attending women hastened to catch some serpent and give her its blood to drink.[111-1] It is well known that in ancient art this animal was the symbol of Æsculapius, and to this day, Professor Agassiz found that the Maues Indians, who live between the upper Tapajos and Madeira Rivers in Brazil, whenever they assign a form to any "remedio," give it that of a serpent.[111-2] Probably this notion that it was annually rejuvenated led to its adoption as a symbol of Time among the Aztecs; or, perchance, as they reckoned by suns, and the figure of the sun, a circle, corresponds to nothing animate but a serpent with its tail in its mouth, eating itself, as it were, this may have been its origin. Either of them is more likely than that the symbol arose from the recondite reflection that time is "never ending, still beginning, still creating, still destroying," as has been suggested.