intersect the area of distribution, one of which, that of the Lyvennet, is comparatively small, and runs nearly from south to north to beyond Cliburn, where it joins the Eden ; the other is a wide vale, having little high ground on its west side, but on the east it is margined by the Pennine chain. The course of the Eden in Westmoreland is from S.E. to N.W.
In the areas drained by the Lyvennet and the Eden, the occurrence of Wastdale-Crag boulders varies according to locality. The Lyvennet has its origin in Crosby Ravensworth Fell, at a spot a little more than a mile N.W. of the town of Orton. Here granite blocks are abundant, and they are also common in the neighbourhood of Orton, but not to the same extent as on Crosby Ravensworth Fell, and south of Orton they are comparatively rare. North of Crosby Fell they become very common, being seen in great quantities near the villages of Crosby Ravensworth and Maulds Meaburn, on the Lyvennet. They are also common about the village of Reagill, but not so abundant as to the south thereof. Between the portion of the country just alluded to and the western margin of their distribution, they occur in enormous profusion, and it is in this district that they are found in the greatest abundance. Following the valley of the Lyvennet northward, we find them comparatively rare north of Reagill. They are, however, to be met with between that place and Morland, a village about three miles further north, and also in the country to the east thereof. North of Morland they are rarely seen, but, as before stated, they can be recognized in the walls of the farm-buildings at Cliburn, 1-1/2 mile still further northward.
In the valley of the Eden, which is further removed from their original source than the Lyvennet, they are not so profuse in their occurrence. It has already been stated that they are unknown in this valley as far south as Kirkby Stephen ; and it is immediately north of the river Bela where they are first recognized. The buildings at Brough Sowerby furnish them in considerable quantities, and some are here also to be seen on the surface. A few occur near Brough itself, and they are abundant near the village of Great Musgrave. The neighbourhood of Warcop exhibits them in considerable profusion, but north of this they begin to become rare ; they can, however, be found in the country round Appleby, and are occasionally seen in the walls.
From Appleby northwards their occurrence is uncommon. There are, however, a few spots near Kirkby Thorpe and Temple Sowerby which afford them ; and, as before mentioned, Professor Phillips has recognized them as far north as Long Wathby.
In the valley of the Eden, the area of their greatest distribution has a W.S.W. and E.N.E. course, and passes between Great Musgrave and Warcop. This area, if extended westwards into the valley of the Lyvennet, and from thence to the parent source of these blocks, would give us the region of their greatest distribution, between the valley of the Eden and Wastdale Crag. If we extend this area eastwards from the valley of tho Eden, it would mark the
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