The reputed discovery of an adze (Fig. 28), of a variety of greenstone which Mr. Wyndham identifies with melaphyr, many years ago in the Victoria Cave, may offer additional evidence as to its having been occupied by a neolithic tribe. It was presented to the Museum of the Philosophical Society at Leeds by Mr. Jackson, and figured by Mr. Denny among the remains from the Caves of Craven, and presents characters that have not, to my knowledge, been met with in any other neolithic implement found in Great Britain: one end being roughly chipped for insertion into a socket, while the other is carefully ground into a chisel edge. In these respects, as Mr. O’Callaghan and Mr. Denny have observed, it bears a striking resemblance to the stone adzes used by the South Sea Islanders, and especially in Tahiti;--a resemblance so strong that, unless it had been traced from the hands of the discoverer into the Museum at Leeds, it would be considered by many archæologists as an implement actually obtained from the South Seas. It may have been derived from the lower stratum, which furnished the equally peculiar harpoon, Fig. 26. _The Approximate Date of the Neolithic Occupation._ From the position in which these remains occurred, it is obvious that a neolithic tribe occupied the cave before the accumulation of the angular fragments, six feet in thickness (Fig. 20, No. 3; Fig. 21, No. 3), just as the date of the Brit-Welsh occupation is fixed as being after this, and before the accumulation of the two feet of débris above (No. 5). And in this we have a means of roughly estimating the interval of time between them. It is clear that the accumulation of two feet of angular fragments, torn away by the action of the weather from the cliff, has been formed in about 1,200 years, _i.e._ between the Brit-Welsh occupation and the present time. If it be admitted that equal quantities of the cliff have been weathered away in equal times, it will follow that the thickness of six feet between the Brit-Welsh stratum and that under examination was formed during a time thrice as long, or 3,600 years; and that consequently the date of the earlier occupation of the cave by man is fixed as being about 4,800, or 5,000 years ago. It is perfectly true, that in ancient times the frosts may have been more intense than they are now, and therefore that the rate of weathering may have been faster. To the objection that possibly a large mass of cliff may have tumbled down at one time, and subsequently been disintegrated, it may be answered, that at the point at the entrance where the section was taken there was no evidence of any such fall; the angular blocks, both above and below the Brit-Welsh stratum, being as nearly as possible of the same size, and not lying with their faces parallel to each other, as would have been the case had they been disintegrated fallen blocks. Nevertheless this attempt to fix a date cannot lay claim to scientific precision, and in that