Harpoons, Pin, Awl, and Needle—Kent’s Cavern. With these animals man, from time to time, disputed possession of the cave. At one place on the surface of the cave earth is found what is known as the “black band.” This is nothing more or less than the fire-place of these old tribes. Here we find fragments of partially consumed wood, bones showing the action of fire—in short, every thing indicating a prolonged occupancy by man. No one can doubt but that this deposit of cave earth itself requires a prolonged time for its accumulation.8 But this period, however prolonged, at length comes to an end. From some cause, both animals and man again abandoned the cave. Another vast cycle of years rolls away—a time expressed in thousands of years—during which nature again spread over the entombed remains a layer of stalagmite, in some places equal in thickness to the first formation. Above this layer we come to a bed of mold containing remains of the later Stone Age, of the Bronze, and even of the Iron Age. Below the first layer of stalagmite—the completed biography of Paleolithic times; above, the unfinished book of the present. Such are the eloquent results obtained by the thorough exploration of one cave. The results of all the other explorations, in a general way, confirm these. Mr. Dawkins explored a group of caverns in Derbyshire, England. These caverns and fissures are situated in what is known as Cresswell Crags, the precipitous sides of a ravine through which flows a stream of water dividing the counties of Derby and Nottingham. This cut represents the different strata in Robin Hood cave. It will be seen that, at one place, the stalactite has united with the stalagmite below. It is not necessary to go into the details of this exploration. All the relics of man found in _d, c,_ and the lower portions of _b,_ are the rude and massive forms peculiar to the River Drift tribes. But the relics found in the breccia _a,_ and the upper portion of the cave earth _b,_ denote a sudden advance in culture. The rude tools of the lower strata are replaced by more highly finished ones of flint. Robin Hood Cave. The most important discovery was that of a small fragment of rib, with its polished surface ornamented with the incised figure of a horse. The peculiar value of this discovery is, that it serves to connect the Cave-men of England with those of the continent who, as we shall afterward see, excelled in artistic work of this kind.