From a workshop at Mill creek, Union county, Illinois, there are a large number of pieces in every stage of work. Among them can be made series of all the different types here given, from the nodule in its natural state to the completed implement. Near by is a flint deposit showing extensive aboriginal quarrying.
Fig. 171.—Chipped spade, ovoid.
Dawson,[125] in speaking of these implements, says: “The rudest of all rude implements, similar to the paleoliths of Europe, were used by the more settled and civilized agricultural nations.” While the majority of them are rude, simply because there was no necessity for elaborate work or fine finish in tools of this class, yet there are many specimens (as, for example, the one shown in [figure 171]) which in symmetry and workmanship will compare favorably with the larger specimens of other types, due regard being had to the fact that the coarse flint of which they are usually made does not admit of the most delicate execution.
Turtlebacks.
The singular name “turtleback” is suggested instantly on seeing a specimen of the class so designated by Abbott and others. As commonly used, it refers to rude or unfinished leaf-shape implements of any size, which may be found in great abundance almost anywhere. It is used here, however, to denote more especially the disks or almond-shaped pieces of flint or chert sometimes found cached in considerable numbers.
Perkins[126] records the discovery of such caches in Vermont; an exceptional case, as they are seldom found outside of the Mississippi valley. The southern portion of Illinois has furnished more than any other section; those found there are almost invariably made from nodules of bluish gray hornstone, the concentric lines being strongly marked.[127]
Fig. 172.—Chipped spade.
The Bureau has secured a large number from southern Illinois, ranging from 3½ to 7½ inches in length, some nearly circular, others having a length nearly twice the breadth. All have secondary chipping around the edges. Many of the larger ones and most of the smaller have the edges more or less worn or polished in such manner as would result from use as knives or scrapers. A typical specimen is shown in [figure 175].