I 



328 ON THE HIGHLANDS. 



burn, which issues from the small lake, at the 

 foot of the acclivity, and runs for some distance,, 

 almost parallel to the former ; and- 3. The Clag- 

 gan-burn, along which is the first part of the com- 

 mon ascent from the west. The 4th stream, to 

 which I allude, is that which directs the course of 

 the traveller, in ascending the acclivity from the 

 small lake just mentioned. It takes its rise from 

 the last spring which we meet with before reach- 

 ing the summit ; and after an unusually precipi- 

 tous and abrupt course to the south-west, falls into 

 the river, at a short distance from the house of 

 Glen- Nevis. The 5th stream begins immediately 

 under the junction of the great ridge which backs 

 the mountain on the south. Its head lies about a 

 mile westward from that of the Stone-burn first 

 described; and being on the opposite declivity of 

 the ridge, the course of the stream is south- 

 ward. This rivulet, which, if possible, is still 

 more direct and precipitous in its course, than the 

 fourth stream, falls into the Nevis a few miles 

 above the house. 



Of these rivulets, the Claggan-burn is commonly 

 the first which occurs to observation. At the 

 place where it reaches the level country, mica- 

 slate is found, but hardly ascends to any height. 

 The overlying formation soon appears, as we be- 

 gin to go up the 



BASS. 



In this formation, the general substance of the 

 rock is a granular aggregate of felspar, horn- 



