a handful: the vein of co.l was S feet thick, 1 foot and from the s.rface, and running horizontally.”
7. Accordingly, my first attention was directed to this locality, to which Mr. HYLAWD undertook to conduct me. On the find ber, therefore, in company with him I descended the Dmlah GhaL. Om the 3rd Mr. HYLAND pointed out two spots, where, he than stated to me “he had been infonned, that coel had been excavated, on onine former occasion, but that he himself had never obtained ocular d.moostration of its presence.’
8. At the first of these two places, unpromising as it appeared I menced excavations, at a spot laid down from observed bearings. In the accompanying sketch it is marked r, and lies at the foot of a pespondicn1st precipice, over which in the rains a torrent is precipitated, and whiá in the course of time, has worn away the rock, so as fully to develop the stratification. At the base of this fall, is seen a vein of what I consider to be hard flinty shale, which I find to posses. a specific gravity of from 2.83 to 2.547, and of which abriefmination is given below.
9. The width of this fall is about 100 feet, and its height about 80, of which 60 feet, or perhaps more, from the top, are strata at sandstone; then comes the vein of shale, running in nearly a horizontal diroctioti southeast by south, and varying in thickness from 12 to 14 fret: the exposed surface appears to be a hard shale or flinty slate. 1 pelsetsat. ed, for 8 or 10 feet below the mass, at right angles to its direetboos or strike, and arrived at a hard sandstone. I then sunk a vertical shaft but was stopped by a similar rock, about 8 feet below the surface. The opening of a small cave presenting itself on the left extremity, I had it enlarged, hoping by this means to penetrate to the rear of the vein, the cave Was not more than 18 inches in height, and appeared to run nearly horizontally. I was in hopes that the north side of th. cave would have afforded encouraging indications, but was disappointed, meeting only with the same indurated slate.stone.
10. About 1000 or 1200 yards southeast of this spot, appeals another bed of shale, or rather perhaps another portion of the same bed, at the base of the rock forming the bank of the adjoining maUah at 0; a similar vein is also developed at H.
11. The unlink at o runs through the formation, which appears Ct intervals on the abrupt face of the banks of the nullab on either aide. About o the formation is exposed for about 14 feet in perpendicular height; it is composed of thin alternate undulating strata of a flinty slate and a species of indurated clay of about half an inch to * inches in thickness; it is harder as it approaches the bottom of the
