Among the gods or demigods of the Abnaki are those who particularly preside over the making of petroglyphs. Their name in the plural, for there are several personages, is Oonagamessok. They lived in caves by the shore and were never seen, but manifested their existence by inscriptions on the rocks. The fact that these inscribed rocks are now very seldom found is accounted for by the statement that the Oonagamessok have become angry at the want of attention paid to them since the arrival of the white people and have caused the pictures to disappear. There is no evidence to determine whether this tradition should be explained by the fact that the ingenious shamans of the last century would sometimes produce a miracle, carving the rocks themselves and interpreting the marks in their own way, or by the fact that the rock inscriptions were so old that their origin was not remembered and an explanation was, as usual, made by ascription to a special divinity, perhaps a chieftain famous in the old stage of mythology, or perhaps one invented for the occasion by the class of priests who from immemorial antiquity have explained whatever was inexplicable. At a rock near the mouth of the Magiguadavic river, at the time immediately before the Passamaquoddy Indians chose their first governor after the manner of the whites, the old Indians say there suddenly appeared a white man’s flag carved on the rocks. The old Indians interpreted this as a prophecy that the people would soon be abandoned to the white man’s methods, and this came to pass shortly after. Formerly they had a “Mayouett” or chief. Many other rock carvings are said to have foretold what has since come to pass. Strange noises have also been heard near them. The Omaha superstition is mentioned on pages 91-92 infra. The Mandans had an oracle stone on which figures appeared on the morning after a night of public fasting. They were deciphered by the shaman, who doubtless had made them. Mr. T. H. Lewis (_a_) gives the following tradition relating to the incised bowlders in the upper Minnesota valley: In olden times there used to be an object that marked the bowlders at night. It could be seen, but its exact shape was indistinct. It would work making sounds like hammering, and occasionally emit a light similar to that of a firefly. After finishing its work it would give one hearty laugh like a woman laughing and then disappear. The next morning the Indians would find another pictured bowlder in the vicinity where the object had been seen the night previous. Mr. J. W. Lynd (_a_) says of the Dakotas: