132 Primaeval Man in the Valley of the Lea. periods, even down to Neolithic times. No doubt the fossil bones, if a good series could be obtained, would show a succession of, or possibly different groups of, animals in the different deposits; but the bones, antlers, and teeth met with by me are at present insufficient to define any such groups with distinctness. The day will come when we shall know much more of Palaeolithic men than we know now. At present we only know that such men once existed, and made weapons and tools of stone during long periods of time. How or where they first appeared as human creatures we can only guess. When we know more we shall modify our use of such terms as "River Drift Men," "Cave Men," &c., and we shall pro- bably be able to mark out more or less distinctly a succession of men, a succession of geological events, and a distinct succession of progressive steps in the men from the lowest savage to the barbarian. Some of our ignorance is undoubt- edly caused by the undue attention which has been bestowed on the collection of ornate implements, and to the employment of gravel-diggers for their collection. No greater mistake can be made than the mere getting together of the more highly- finished and perfect implements. We only learn from them that certain makers—at first few and far between, common at last—acquired extraordinary skill in the manufacture of stone tools and weapons. For one perfect example, twenty have their points, butts, or edges injured either by peaceful or warlike work. Collectors will not put the damaged ex- amples and failures in their "cabinets"; but every damage tells some story of the use of the implement, and throws some light on the character of the being who made and used it. Implements could not have been made without fabricating- tools—without punches, hammer-stones, and anvils ; where the ordinary implements are these latter things also are. Implements such as are seen in museums are only fit for moderately rough work; very rough work was sometimes done, but rough and massive stones artificially worked are seldom seen in collections. The Valley of the Thames has yielded me between 400 and