We get something more tangible, if not more decisive, when we come to the monumental evidences. DeWitt Clinton and Samuel L. Mitchell found little difficulty at one time in making many people believe that the earthworks of Onondaga were Scandinavian. A pretended runic inscription on a stone said to have been found in the Grave Creek mound was sedulously ascribed to the Northmen.[671] What some have called a runic inscription exists on a rock near Yarmouth in Nova Scotia, which is interpreted “Hako’s son addressed the men,” and is supposed to commemorate the expedition of Thorfinn in A.D. 1007.[672] A rock on the little islet of Menana, close to Monhegan, on the coast of Maine, and usually referred to as the Monhegan Rock, bears certain weather marks, and there have been those to call them runes.[673] A similar claim is made for a rock in the Merrimac Valley.[674] Rafn describes such rocks as situated in Tiverton and Portsmouth Grove, R. I., but the markings were Indian, and when Dr. S. A. Green visited the region in 1868 some of them had disappeared.[675] [Illustration: INSCRIPTION ON DIGHTON ROCK. NOTE.—The opposite plate is reduced from one in the _Antiq. Americanæ_. They show the difficulty, even before later weathering, of different persons in discerning the same things on the rock, and in discriminating between fissures and incisions. Col. Garrick Mallery (_4th Rept. Bureau of Ethnology_, p. 250) asserts that the inscription has been “so manipulated that it is difficult now to determine the original details.” The drawings represented are enumerated in the text. Later ones are numerous. Rafn also gives that of Dr. Baylies and Mr. Gooding in 1790, and that made for the Rhode Island Hist. Society in 1830. The last has perhaps been more commonly copied than the others. Photographs of late years are common; but almost invariably the photographer has chalked what he deems to be the design,—in this they do not agree, of course,—in order to make his picture clearer. I think Schoolcraft in making his daguerreotype was the first to do this. The most careful drawing made of late years is that by Professor Seager of the Naval Academy, under the direction of Commodore Blake; and there is in the Cabinet of the American Antiquarian Society a MS. essay on the rock, written at Blake’s request by Chaplain Chas. R. Hale of the U. S. Navy. Haven disputes Blake’s statement that a change in the river’s bed more nearly submerges the rock at high tide than was formerly the case. Cf. _Am. Antiq. Soc._ Proc., Oct., 1864, p. 41, where a history of the rock is given; and in Wilson’s _Prehistoric Man_, ii. 93.]