^{page 295 note *} This is the case where the drift, or boulder clay, is now being denuded on the Durham coast. I know of several instances of the kind in the neighbourhood of Snnderland, one of the best occurring about two miles or more to the north of the harbour, on a level tongue of limestone called Whitburn Steel. Scattered over its surface are some dozens of large boulders of mountain-lime-stone, magnesian-limestone, millstone-grit, and basalt, the majority being partially covered with marine parasites, and several are lodged in alight hollows. And though I have known this locality for many years, and have almost a personal acquaintance with some of the boulders, I have never observed indications of any of them having shifted their position. Indeed, it is astonishing to observe how little, or rather how Blowly the boulders are affected by the surf; there are some whose distance from the cliff is indicative of the period that must have elapsed since they were washed out of the olay, which still retain an angularity of surface; and there are others which have laid on the beach for years℄where not scoured by sand or gravel℄that have not yet lost their striated surfaces. In the cliff or bank of clay other large boulders may be seen ready to drop out, and at the base of it, or in close vicinity, are others which have lately fallen, to whose number every winter's frosts and storms make additions.