Both Catlin and Sellars have said that the knowledge of cleavage in stone is an acquired art. We have in modern times the lapidary who works semi-precious as well as precious stones. He must understand the texture of every stone he works. So with the lapidary who worked carnelian, agate, and chalcedony—which are semi-precious stones. No ordinary aboriginal workman made these specimens. They were the work of an artist who was a lapidary. He was an expert in selecting his material and he was an expert in bringing it to completion. In color and shape these specimens reminded me as a boy of a certain sun-fish in the streams in that part of Ohio, and we used to call them “sun-fish spears” to distinguish them from the others. [Illustration: FIG. 131. (S. 1–2.) Flint arrow-heads, spear-points, and knives from eastern Wisconsin. These interesting specimens represent eight types. All of them are of superior workmanship. The beautiful leaf-shaped object below the top row is especially fine. The irregular form in the centre to the right is very rare. H. P. Hamilton’s collection, Two Rivers, Wisconsin. ] [Illustration: FIG. 132. (S. 1–6.) 50 flint implements from the collection of John T. Reeder, Houghton, Michigan. These are from various portions of the Ohio Valley and Tennessee. The flint fish-hook is a rare specimen. The two objects in the lower line near the middle are interesting, in that the stems are very long and the points exceedingly short. This may be intentional or not. It may be that the objects were broken and then re-chipped. ] There are examples of the work of these artisans in near-by sections of Ohio, but they are most common in Ross, Warren, Clinton, and Greene counties. I never heard of them in Indiana or Kentucky. From the number of them found I venture the opinion that the art was handed down through several generations, for I do not believe that two or three men could have made them all. Furthermore, there are other specimens of this same peculiar pattern to be found in southern Ohio. These, while creditably done, are not the work of an artist. The famous workmen may have had imitators, or they may have attempted to train others in order that the art might be perpetuated. Be that as it may, the other implements bear the same relationship to these beautiful products as does a copy made by an amateur of a famous painting to the work of the great artist himself. Readers are requested to study carefully the style, form, and chipping of these “S”-marked specimens shown in Fig. 115. [Illustration: FIG. 133. (S. 1–2.) Arrow-points from Oregon and Washington. H. P. Hamilton’s collection, Two Rivers, Wisconsin. ] [Illustration: