180 
Hecords of the Geological Surreij of India. 
[vOL. XT. . 
At tlie outfall, no rocks are seen m situ. The barrier, now modified by a ] 
sluice, appears to be mainly formed of debris thrown down by landslips. The 
first rock which I detected in situ in the bed of the stream was the already men¬ 
tioned greenstone, which will, I believe, prove to be at a lower level than the bot¬ 
tom of the lake. 
As I only had a single day to spend at this lake, I was unable to exa¬ 
mine the characters of the wide and unusually .straight valley below the 
village of Malwa Tal {vide map) ; its examination may throw some light on the I 
subject. 
Naukachia Tal. —This curiously irregular-shaped lake has received its name 
from its nine corners. It is situated about one mile and a half to the south-east 
of Bhim Tal. It occupies a hollow on the slope, and is surrounded by low 
hillocks, not by pairs of distinct ranges, as are the previously described 
lakes. 
With a very narrow outfall on the north-west, its appearance, as seen from a 
mile distant, suggested its being little more than a shallow pond. And it did not 
seem to me to he advisable to curtail my already too short time at the other lakes 
by paying it a special visit. On returning to Naini Tal, I found, very much to 
my astoni,shment, that its depth is recorded at 132 feet, thus being the deepest 
of the series. If this he the correct depth, it renders the lake one of the most 
singular of all. Its shape, the nature of its surroundings, and the naiTow wind¬ 
ing course of the outfall, all seem inconsistent with the view that it is of glacial 
origin. 
Its length is given at 3,120 feet, its breadth 2,270 feet, and its approximate 
elevation above the sea 4,000 feet. 
Sat Tal. —The so-called Sat Tal, or seven lakes, are situated about the same 
distance to the west of Bhim Tal that Naukachia is to the south-east. They are 
surrounded on all sides by steep hills, a narrow valley, 100 yards wide, at the out¬ 
fall of the principal lake serving to carry off the drainage. What the maximum 
depth may be, I do not know; but two soundings, which I took in the western 
arm of the principal lake, gave depths of about 58 feet. The artificial dam and 
sluice somewhat increases this depth over what it would be naturally. 
At the outfall there is a landslip, and I do not think any rocks are seen in 
situ till a much low'cr elevation is reached than 58 feet below water-level. 
It is scarcely probable that this group of the seven lakes was in any way 
formed by glaciers. I have seen in parts of the Central Provinces, where no 
question of glaciers can arise, denuded hollows among hills, which, if closed by 
landslips, would form very similar lakes. 
Since writing the above, I have received from Mr. Yule, of Bhim Tal, the 
accompanying plan of soundings, which he has kindly taken in the principal of 
the Sat Tal at my request. ^ 
When it is remembered that this curiously shaped lake has but one narrow .1 
outlet, and that it is otherwise surrounded on all sides by hills, but without •' 
any considerable catchment area for a glacier to bo formed and fed, the diffi- ^ 
culty in the way of a glacial theory of origin becomes strikingly apparent. j 
