Sufficient correspondence is traceable between the implements of the cave-earth and the river-drift to assign them to the same era; and so to justify us in testing its arts by their combined disclosures. The ossiferous cave of Brixham, which has recently been subjected to an exhaustive scientific investigation, consists of a series of galleries and passages in the Devonshire limestone. They are partly natural fissures, and partly chambers hollowed out by the action of running water. Those have been refilled with gravel, red cave-earth, and layers of stalagmite, which were in process of deposition while the _ursus spelæus_, or great cave-bear, still haunted their recesses, and when the reindeer was a native of the neighbouring region. Though visited from time to time by man, Brixham cave had never been made his dwelling-place or workshop; and so it has revealed only his rudest tools. Of these, Fig. 4 is a characteristic example of a rude lanceolate implement, which embodies within itself some very significant glimpses of the era to which it belongs. The great valleys were excavated and refilled with the rolled gravel of the drift during the prolonged operations of ice and floods. But it is here seen that the violence of the floods extended even to the recesses of the caves. The implement has been broken into three pieces, evidently at the period of the original filling up of the cave. One portion was recovered buried in the cave-earth of the flint-knife gallery; another fragment lay far apart, under three and a half feet of earth, in a neighbouring gallery; while a third portion has escaped even the careful and discriminating search which resulted in the recovery of those long-dissevered fragments. It has to be borne in remembrance that every fragment of flint found in the cave-earth was preserved, whether showing traces of human workmanship or not. Thirty-two fragments were discovered in all; with an interval of nearly a month between the finding of the first and second portions of the implement figured here. A still longer period elapsed before it was noticed that they fitted to each other as parts of the same worked flint. Most of the fragments so found have undergone great alteration in their structure, and have become absorbent and brittle. How little chance, therefore, is there that any delicately formed flint-tool should be recovered in the rolled gravel-beds!