In collecting numbers of these unfinished bird-stones, my object was to prove that these slender, delicate objects did not indicate European knowledge or influence, but were wrought after much labor from ordinary stone by prehistoric man. None of them show the marks of steel cutting-tools. Fig. 400 is the roughest one and yet the ears or eyes stand out in relief. Fig. 399 is interesting in that it shows three on which the result of pecking and battering is in evidence. The one to the left, lower row, has been pecked, and ground, and was in process of being polished when the work ceased. [Illustration: FIG. 407. (S. 1–2.) Collection of Leslie W. Hills, Fort Wayne, Indiana. ] Fig. 401, Andover collection, found in Ohio, is a large bird-stone about five inches in length. The marks of the flint cutting-tool or of the hard grained rubbing-stone, which cut the softer surface of the slate, are still apparent. Fig. 404 presents various bird-stones, both rare and common forms, with and without ears. These are found long and slender, short and thick, almost as low as the bar-amulet, and also so high that they merge into other effigies. Six bird-stones from the collection of Mr. Leslie W. Hills of Fort Wayne, Indiana, are shown in Fig. 407. [Illustration: FIG. 408. (S. 3–5.) “This specimen is from western New York. It is made in the form of a bird which from the number of similar specimens have given the name to this class. The eyes are represented by great protuberances, which must have greatly increased the difficulty of manufacture. It is made from a boulder or large piece, and while the material is hard, it is not rough but rather fragile. It could not be chipped like flint nor whittled like soapstone, but must have been hammered or pecked into shape and afterwards ground to its present form, then polished until it is as smooth as glass. A consideration of the conditions demonstrates the difficulty of making this object and the dexterity and the experienced working required.”[1] Material: diorite with feldspar crystals. Smithsonian collection. Otis M. Bigelow’s collection, Baldwinsville. ]