150 baker's north YORKSHIRE. 



its slope, in descending from which towards the Uttle stream 

 which runs down this open undulated hollow, the Middle Lime- 

 stone is obscurely seen at a depth of 150 feet below the Under- 

 set band. Upon these crags there is abundance of Sesleria and 

 Draba incana, a little Yew and Juniper, of the Hieracia, 

 If. murorum and H. gothicum, and Asplenium viride and Ortho- 

 thecium intricatum are also to be met with. At Thwaite we cross 

 the Cliff Gill stream in front of a pretty little waterfall over lime- 

 stone. This streamlet descends from the Buttertubs Pass, over 

 which, between Great Shunnor Fell and Lovely Seat, runs the 

 road from Upper Swaledale to Hawes. CUff Gill is an open 

 grassy hollow, with the Main Limestone in it at about the same 

 height as at the south end of Kisdon. Upon the banks of 

 its stream we have Rubus saxatilts, Galium sylvestre, Hiemcium 

 anglicum, Aspleniwn viiide, Gymnosiomum iiipestre,Amphoridium 

 Mougeotii and Bartramia CEderl. At Muker this stream joins 

 the Swale, which in the four miles from the smelting mill above 

 Keld has declined from iioo to 850 feet. Here we have 

 Orthotrichum tenellum and O. strauiineum in hedgerows and in 

 the fields Carduus heterophyllus in greater plenty than I have 

 seen it anywhere else. This is the part of Swaledale where the ' 

 lowest strata are exposed. Both in Kisdon and the opposite 

 fells the Main Limestone attains 1550 feet above the sea-level, 

 the Lower Scar Limestone beds being exposed in the bed of 

 the river 700 feet below the upper surface of the Yoredale 

 series, and consequently this latter 250 feet thinner than it is in 

 the neighbourhood of Hawes. 



Eastward we have now on the north between Swaledale, 

 Arkengarthdale, and the Greta watershed a grand sweep of 

 ramified elevated moorland. From the Swale to the summit of 

 drainage on the north the distance is at least five miles. On 

 the edge of Gretadale, Water Crag attains 2176 feet, about 900 

 feet of which is Millstone Grit. This is the extreme thickness 

 which the gritstone reaches in North Yorkshire, the upper beds 

 being of later date than are to be met with in any other station 



