Moss — On the Kvj^Iomtion of Balhjbetagh Bog. 549 



the boulders, but had many of the stones turned over to see if bones 

 lay under them. In no case, however, did I find a stone resting on 

 any of the bones. Two of the larger boulders were quite too heavy to 

 move ; bones were found in cavities partly under these, in each case 

 on the north side of the boulders. Near one of these boulders twenty- 

 nine bones were found within a space of little more than four square 

 feet. The general appearance which the bottom of the trench pre- 

 sented, when the remains of Hegaceros were removed, reminded me of 

 the rocky margin of a mountain tarn. It dipped slightly towards the 

 west side, as shown in the accompan3ring sketch (fig. 1, a). Judging 

 from the present appearance of the ground, the water of such a tarn 

 could not have extended more than a few yards to the east ; for on this 

 side rises the southern base of the hill which forms the eastern side of 

 the glen. I decided upon excavating the next trench further from 

 the supposed margin of the tarn, and therefore at the west side of the 

 di'ain. The point selected is marked I on the map (fig. 2). This 

 trench was only eight feet square, but extended to a much greater 

 depth than the first trench. At a depth of ten feet there was no sign 

 of a stony bottom, although we had reached blue clay resembling that 

 found between the boulders at the bottom of trench a. The blue clay 

 was probed in every direction with a stout stick, which was easily 

 forced into it to the extent of about 3 feet, but no hard substances 

 were encountered. The only bone found was a solitary rib in the brown 

 clay, about 6 feet from the surface. The position of the stratum in 

 which this rib occurred is shown by vertical shading at c, fig. 1. 

 Although this represents the section of a trench made subsequently, it 

 illustrates equally well the section of trench h. This excavation was 

 not sufficiently large to be worked vrith advantage, so it was aban- 

 doned, and another one commenced at a spot where I thought there 

 would be less difficulty in reaching the bottom. The position of this 

 trench is shown at c, fig. 2, and the section of it at c, fig. 1, where 

 the various strata, corresponding with those encountered in the first 

 cutting (c, fig. 1), are connected with them by straight lines. It 

 will be observed, that the peat in trench c is nearly twice as deep as 

 that in a ; while the stratum of sand has thinned oat to a mere trace. 

 The next stratum in c is one that was not observed at all in a. It 

 consists of a grey-coloured friable clay, containing layers of vegetable 

 matter, often moss. This clay contained in some places numerous 

 white specks, which turned blue on exposure. I found a few frag- 

 ments as large as hazel-nuts. On analysis, this matter was found to 

 consist almost entirely of ferrous phosphate, or A^ivianite. The next 

 stratum encountered in this trench consisted of brown clay, corres- 

 ponding in appearance with that in which the bones were found in the 

 first cutting. The only bones found in this, however, were two 

 decayed fragments. The brown clay stratum was about 4 feet deep, 

 and under it lay blue clay, like that which filled up the interspaces 

 between the boulders in trench a. I cannot tell how far the blue clay 

 extended. When the trench had reached the depth of 12 feet, we 



