IN GALLOWAY. 



S8S 



tical ; direction as before, N. and S., touching the 

 granite. 



3. One mile north of the castle, compact gneiss, 

 vertical ; direction N. N. E. Do not know how 

 far from the granite. .ii; fj- 



4. About 100 yards farther north, on the banks 

 of the lake, vertical strata of compact gneiss ^ di- 

 rection N.N. W., within about 120 yards of the 

 granite. 



5. The junction of the granite and gneiss, evi- 

 dently crosses the lake about this place, running 

 in an oblique direction towards the castle. To 

 this, we now proceeded in a boat^ and I found in 

 the island on which the castle stands, on the south 

 side, a mass of flesh-red felspar-porphyry, about 

 12 feet long by 3 feet thick, vertical as far as J 

 could judge, (for this from its being about even 

 with the granite all around, is not easily deter- 

 mined), and running N. N. E. From its direc- 

 tion merely, I should call it a bed rather than a 

 vein. 



6. I now proceeded to the west side of the lake, 

 and found on its banks, to the S. W. of the castle, 

 granite veins in abundance ; or granite and com- 

 pact gneiss alternating a vast number of times, 

 and running in all directions on the nearly hori- 

 zontal surface' of the rock, laid bare by the waters 

 of the lake. Some of these veins, or alternations, 

 were three feet thick, and from this downwards 

 to less than an inch. 



