AT THE CAPE OF GOOD HOPE. 
291 
prevented the sense of fatigue. At not more than one hundred 
yards from the mill, I first encountered any schistus which could be 
considered as forming a component part of the mountain. It was so 
much decomposed and so covered with the fragments of other rocks, 
that I could determine little else about it than that even, at its very 
commencement, it had an intermixture of granite. Passing onward, 
I found the bed of the torrent widening and less choked with frag- 
ments, and exposing here and there large surfaces of schistus through 
which granite was ramifying in every possible direction, and in the 
most irregular shapes. 
In one place I observed a broad vein of equal dimensions through- 
out, traversing the whole exposed surface of schistus ; in another, 
a vein of equal breadth sending out large lateral branches, some- 
times straight, frequently very tortuous, and even twisted in their 
course. Sometimes a vein commenced of great breadth, but sud- 
denly contracted in width, or dissipated in innumerable streamlets. 
Similar appearances were visible in the wall of the ravine, to the 
right hand of the spot where I now stood, my face being towards 
the mountain. In this wall I observed broad perpendicular veins 
of granite passing through schistus, in the manner represented by 
No. V. of the Geological Views of the Cape. Advancing higher up, 
p p 2 
