104 A NEW FLORA OP 



Polypodium calcareum. 

 Equisetum variegatitm. 

 Poa Parnellii. 

 Galium sylvestre. 



Tofieldia paliistrls. 

 Scirpus pauciflorus. 

 Armeria maritima. 

 Primula farinosa. 



On the north of Widdy Bank the Main Limestone reaches an 

 elevation of 1800 feet in Bleak Law, which extends from the 

 "Weel to the church in Harwood Dale, and above it the gritstone 

 rises to 2028 feet. This first dale, Harwood Dale, is broad and 

 open, the lower part being filled with grassy fields. There is a 

 good road along the east side of it leading to Alston, and at its 

 head Burnhope Seat attains 2368 feet, and Highfield, just above 

 the Grasshill lead-mines, 2322 feet. The dale is 5 mUes long 

 from north to south, and joins Langdon Dale, a narrower dale 

 with steep banks and very little population, at Langdon Bridge 

 (1250 feet), and the united streams fall into the Tees a mile 

 above the High Force. The flat stretch of gi-ound round the 

 poiut where the streams join is called the "Whetstone Sill, and 

 here loegin Fofentillafnificosa, Salix phylicifoUa, Halenaria albi- 

 da, Crepis succisoefolia, Hieracmm gotliicum, crocatum, and corymi- 

 osum. East of Langdon Bridge the bank of the dale for several 

 miles is steep and girdled conspicuously by the lines of limestone 

 clifi*, which, from 2100 feet in Highfield, decline very gradually 

 towards J^ewbiggin Moor. The peaks of this ridge are Fendrith 

 Hill (2284 feet) and Outberry Plain (2143 feet). From the foot 

 of the Caldron Snout to the head of the High Force the Tees 

 declines in level from 1430 to 1000 feet. The High Force is a 

 very fijae waterfall. Here the main stream of the Tees, its waters 

 contracted often into a deep narrow channel, makes a sheer leap 

 of 69 feet into a ravine, the cliffs of which margin the stream for 

 a considerable distance below it. The cliff is dark-coloured ba- 

 salt, resting upon a mass of dark-coloured indurated shale, and 

 that upon limestone, and when the stream is full the waters flow 

 Tipon both sides of the massive angular crag which overlooks the 

 main descent. On the Durham side of the river the slope is 

 covered by a large plantation, principally of spruce, and on the 

 Yorkshire side the moor reaches down to the edge of the cliff. 

 A more beautiful spot for a summer-day's excursion than this 



