It has been supposed that the upper St. Lawrence or Detroit River, streams noticed by the Indians as abounding in fish, was the "Fish River" of the Heckewelder tradition. Here, as we have seen according to information collected from the Lenni Lenape, desperate battles had taken place with the Allegwi, hundreds of whom were slain and buried under mounds in that vicinity.[L] Other considerations, too, induce us to suppose that the Lenape and Huron-Iroquois invasion came from the northward and not from the west. If we study the shape and position of the mounds themselves along the southern shore of the great lakes, we find that they present often the appearance of fortifications erected against the advance of an enemy from the north, and suddenly abandoned after a long struggle. Also the scattered implements and half-removed blocks of ore found in the prehistoric copper mines on the south shore of Lake Superior, seemed to indicate their hasty desertion by the miners upon the sudden inroad of an enemy from that direction. Again, the works of the mound-builders, though at some points insignificant and hardly perceptible, extend considerably west of the Mississippi, and probably would have been encountered by the advancing Lenape before reaching that river, and had it been the stream meant it would not have been spoken of as the boundary of the mound-builders' empire.[M] The Wallum Olum, however, with its hieroglyphics, does not end with the brief extract given. Song five, consisting of fifty-eight verses, recounts the details of the occupation by the conquerors of the Ohio valley, and long wars with enemies denominated "_Father Snakes_," "_Stone Snakes_," and "_North Snakes_," whose pictograph in the original manuscript is here given (fig. 18). They pass the Alleghenies, and exploring the Chesapeake Bay and great rivers of "the large and long east land," finally establish themselves on the Delaware, making "_Maskekitong_," the rapids at Trenton, the centre of their dominions. We have now reached the time of the coming of the whites, and the last verses of the song speak in brief simplicity of a people who came from somewhere, "and that which was white" (ships) "coming from the East Sea." [Illustration: FIG. 18.] There is still another song--the sixth--continuing the chronicle and recounting the melancholy story of the Lenape's contact with the whites, and final westward journey to Ohio, where the records were obtained. A narrative of sufferings and hard wrongs, whose recital by the Indian had caused Heckewelder, as he said, "to feel ashamed that he was a white man."