"But it is in the aqueo-glacial gravels of the Delaware River at Trenton, which were laid down contemporaneously with the terminal moraine one hundred miles farther northward, and which have been so thoroughly studied by Abbott, that the most conclusive proof of the existence of glacial man is found" (p. 23). "Excluding all doubtful cases, there remains a fairly consistent body of testimony indicating the existence of a widely distributed human population upon the North. American continent during the later Ice epoch" (p. 24). "However the doubtful cases may be neglected, the testimony is cumulative, parts of it are unimpeachable, and the proof of the existence of glacial man seems conclusive" (p. 25). In view of the grossly erroneous statements made by Mr. McGee concerning the Nampa image (described on pages 298, 299), it is necessary for me to speak somewhat more fully of this important discovery. The details concerning the evidence were drawn out by me at length in two communications to the Boston Society of Natural History (referred to on page 297), which fill more than thirty pages of closely printed matter, while two or three years before the appearance of the volume the facts had been widely published in the New York Independent, the Scientific American, The Nation, Scribner's Magazine, and the Atlantic Monthly, and in Washington at a meeting of the Geological Society of America in 1890. In the second communication to the Boston Society of Natural History an account was given of a personal visit to the Snake River Valley, largely for the purpose of further investigation of the evidence brought to my notice by Mr. Charles Francis Adams, and of the conditions under which the figurine was found. Among the most important results of this investigation was the discovery of numerous shells under the lava deposits, which Mr. Dall, of the United States Geological Survey, identified for me as either post-Tertiary or late Pliocene; thus throwing the superficial lava deposits of the region into the Quaternary period, and removing from the evidence the antecedent improbability which would bear so heavily against it if we were compelled to suppose that the lava of the Snake River region was all of Tertiary or even of early Quaternary age. Furthermore, the evidence of the occurrence of a great _débâcle_ in the Snake River Valley during the Glacial period, incident upon the bursting of the banks of Lake Bonneville, goes far to remove antecedent presumptions against the occurrence of human implements in such conditions as those existing at Nampa (see below, pp. 233-237).