202 On the Limboo Alphabet of Sikkim. [No, 3. 



epoch. But between these deposits, there exist perhaps intermediate 

 ones, and on this subject I proposed making researches as well as 

 into the dip and direction of the quartz, when the order to start 

 for Thibet prevented me. 



In the valley of Munnikurn there are three qualities of quartz — 

 1st, quartz compact with a fissure slightly scaly and translucid, in 

 layers subordinate to the mica schist. 2ndly, the compact granular 

 quartz more or less opaque, with a schistoid texture, containing glo- 

 bules of mica disseminated and mingled, as it were, with the mass. 

 3rdly, the mica granular quartz, which extends in a more constant 

 manner on the right banks of the torrent, in a north-westerly di- 

 rection for a distance of more than 10 miles, from the thermal 

 springs, showing at rare intervals a few layers of mica schist. This 

 rock prevails over all others of the same nature, and is so friable, 

 that the frequent landslips give to this part of the valley, an ap- 

 pearance of disorder and sterility that saddens the observer. All 

 leads to believe that this deposit of quartz reposes on the mica 

 schist. Erosions caused by the waters have uncovered, in the 

 lower part of the valley, layers of mica schist in a perfectly horizon- 

 tal position. The mica is not seen in an uniform manner through- 

 out this vast deposit of quartz ; we fell in with series of rocks, 

 that contained only small portions scarcely visible with the mag- 

 nifying glass, and had the aspect of quartzite or quartfels. If the 

 Kooloo district is interesting, in a Geological point of view, we 

 have seen that it is not so in a medical sense, as far as the mineral 

 waters are concerned. 



Note on the Limboo Alphabet of the SikJcim Himalaya. — j% De. A, 

 Campbell, Darjiling. 



Lieut. George Mainwaring, of the 16th Eegt. N. I., (Grena- 

 diers) who has applied himself very sedulously to the acquirement 

 of the Lepcha language, as well as the Thibetan, favoured me, a 

 short time ago, with the annexed copy of the Alphabet of the lan- 

 guage of the Limboos, a numerous tribe, inhabiting the eastern 



