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(if the water-shed. The way was then taken along the summit of the mountain. 

 This walk was very charming, for the views on every side were peculiarly rich. 

 The Skirriil and the Sugar Loaf Mountains were in full view, and rendered almost 

 jmrple by the state of the atmosphere. The sun was absent, but the sky-lights 

 were very variable from the bright light clouds which were rapidly swept by the 

 wind over the mountain summits to the deep gloomy tone of the heavy storm- 

 cloud of rain at a distance. The wind became very boisterous at that time, and 

 swept ui) the valley with a force that threatened to blow the visitors, not to men- 

 tion their hats, into the valley below. One merry member parodying the sufferings 

 of poor Ben the carpenter, said 



" I've met with many a breeze before. 

 But never such a blow." 



Whilst another, more philosophical, was mathematically meditating how much 

 jiressure per square inch he had to contend with. At the head of the dingle 

 Cyrau-r-waun, the opposite mountain gave some little protection, and it was here 

 pointed out that the cattle yoke was represented by the general configuration of 

 the whole valley, with the dingle here and another by Capel-y-ffin, beyond Llan- 

 thony, for the neck of the oxen. A sheep track path was then followed along the 

 side of the hill, at a somewhat perilous angle of 45 degrees, where boots with 

 nails in them were found very useful. On reaching the broken rocks of Cwm-yoy 

 a viper, or adder, Pclius Berus, lay by the pathwa}', which had just been killed. 

 It was twenty inches long, and so bright and clear in its markings that it had 

 evidently but just changed its skin. The poison fangs looked painfully sharp. 

 On the lower parts of the debris, but, high enough to look very perilous, a family 

 of white goats were enjoying themselves with much seeming satisfaction. 



The geological features of Cwm-yoy are not to be read easily in a cursory 

 visit. The " Darens " as they are called, extend for a full mile in length. On the 

 mountain side numerous strata of the Upper Old Red Sandstone are exposed 

 horizontally, varying from a foot or two to twenty or thirty feet in thickness, and 

 reach more or less precipitously to the top of the mountain. In the valley are 

 numerous ridges, sometimes of considerable size, as is the one immediately above 

 the village, a small mountain in itself, divided into two portions. The interstices 

 between all these ridges are filled with rocks and boulders, often very massive and 

 grand. Had two armies of Titans been contending persistently for ages with 

 missiles of rock, they would not have left behind them so rugged a havoc as is 

 there to be seen. The geological agencies, which have produced this succession of 

 land-slips, would give rise to much discussion. Glacial action was looked for 

 about the Cwm through which we had passed, but no structures on the surface, or 

 other tangible proof could be seen of its having been hollowed out by glacial 

 action— something which looked much like a moraine was observed, but time, 

 and the perilous inclination of the path of observations, forbade a more careful 

 examination. The Sandstone strata abound in springs, and water could be seen 

 issuing from them in many places. It seems probable that by their gradual action 

 the landslips have occurred. The Club might well spend another day in the 



