Winsor, Justin, 1831-1897, Maclean, John, 1851-1928, association, MacLean, Harrison John (autograph) · Boston ; New York : Houghton, Mifflin and Co. · leaf 392
we find upon the same object from twenty to forty planes of cleavage,all equally weathered (which shows that the fragments were all detachedat or about the same time), it is impossible not to recognize in this theresult of intentional action. Four such implements are described andfigured, of shapes… … THE TRENTON GRAVEL BLUFF.* As .some geologists were still inclined to insist upon the post-glacialcharacter of the debris in which the implements were found, Dr. Abbott,admitting that the great terminal moraine of the northern ice-sheet doesnot approach nearer than forty miles to the bluff at…
Cartography
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