EXPLANATION OF PLATES. 285 



PLATE X. Hardraw Force near Hawes, 9 9 feet, p. 58. 



The aspect of this waterfall varies in a wonderful degree, according to the 

 hour of day, season of year, and quantity of water. The drawing 

 here given was taken after much rain, when the 'beck' was more 

 than usually violent. I have other sketches which show a mere ' spout' 

 of water, but it is always an impressive scene. Cotter Force, on the 

 same side of the valley, should be visited. 



PLATE XI. Gale Force near Hawes, p. 58. 



The shale, which forms the lower part of these rocks, is remarkably full 

 of delicate corals (Fenestella) and small shells (Orthis). 



PLATE XII. Millgill Force near Askrigg, 69 feet, p. 60. 



Above this, which is the principal fall, the active pedestrian may ascend to 

 another of different character, but very pleasing, which may be called 

 Upper Millgill Force. It is a cascade over gritstone 42 feet. 



PLATE XIII. Aysgarth Force, p. 60. 



The river is seen in a time of ' fresh.' After long drought the rocks are 

 merely relieved by thin sheets and many little jets of water, making a 

 pretty combination. 



PLATE XIV. Brimham Rocks, p. 71. 



It is probable that no great part of the singular appearances presented by 

 these fantastic rocks is due to art. Atmospheric agency is certainly 

 the principal power which has been employed in shaping and grooving 

 the huge masses of millstone grit. How far the perforations and 

 balancings of the rocks may have been aided by the human hand, may 

 be matter of opinion. Nature is constantly performing similar work. 



PLATE XV. Kilnsey Crag, p. 79. 



No valley in Yorkshire is so full of bold cliffs as Wharfedale. In this re- 

 spect it emulates the Craven district, the scars in both cases being 

 formed by the same limestone. 



