rocky front from ten to thirty or forty feet high, gnawed full of little niches and pockets and cavernous recesses by the never-dulled tooth of geologic time and affording dens and retreats where Indians and wild beasts often took refuge. As a boy how I used to haunt these places, especially on Sunday when young winter-green and black birch gave us an excuse to go to the woods. What an eternity of time was written in the faces of those rocks! What world-old forces had left their marks there!--in the lines, in the colours, in the huge dislocations and look of impending downfall of many of them, yet with a look of calm and unconquerable age that can be felt only in the presence of such survivals of the primaeval. I want no better pastime now, far from my boyhood as I am, than to spend part of a summer or autumn day amid these rocks. One passes from the sunny fields, where the cattle are grazing or the plough is turning the red furrow, into these gray, time-sculptured, monumental ruins, where the foundations of the everlasting hills are crumbling, and yet where the silence and the repose are like that of sidereal space. How relative everything is! The hills and the mountains grow old and pass away in geologic time as invariably as the snow bank in spring, and yet in our little span of life they are the types of the permanent and unchanging. The phoebe bird loves to build its mossy nest in these shelving ledges, and once I found that one of our native mice, maybe the jumping mouse, had apparently taken a hint from her and built a nest of thistledown covered with moss on a little shelf three or four feet above the ground. Coons and woodchucks often have their dens in these ledges, and before the country was settled no doubt bears did also. In one place, under a huge ledge that projects twelve or fifteen feet, there is a spring to which cattle come from the near fields to drink. The old earth builders used material of very unequal hardness and durability when they built these hills, their contracts were not well supervised, and the result has been that the more rapid decay of the softer material has undermined the harder layers and led to their downfall. Every fifty or a hundred or two hundred feet in the Catskill formation the old contractors slipped in a layer of soft, slatey, red sandstone which introduces an element of weakness and that we everywhere see the effects of. One effect of this weakness has an element of beauty. I refer to the beautiful waterfalls that are sparsely scattered over this region, made possible, as nearly everywhere else, by the harder strata holding out after the softer ones beneath have eroded away, thus keeping the face of the falls nearly vertical.