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laboriously employed, performed their work without suffering 
any inconvenience from this cause. Several of our party, who 
had frequently been at Pasco, and resided there a considerable 
time, were not affected; and, indeed, the only one who was 
attacked besides Mr. M and myself, recovered almost 
immediately. In this, too, the puna resembles sea-sickness, 
that different individuals, under precisely similar circum- 
stances, are affected in a very different degree, and many do 
not suffer at all. It is, however, worthy of remark, that the 
^ same persons are not equally affected by the two disorders. 
My friend and I, some years before, had made a voyage of 
four months together, and he only suffered for a few hours from 
sea-sickness, while I was never wholly free from it during 
the voyage; but, in the present instance, he suffered more 
severely than I did. Persons of full habit, affected with the 
puna, frequently spit blood. Some months before we passed, 
an Englishman, who had been employed at the mines, set 
out to walk to the coast; he had previously been in bad 
health, and shortly after his arrival at Casa-cancha he died, 
from hemorrhage, having burst a blood-vessel in the lungs. 
The valley of Casa-cancha is about half a mile wide, 
abruptly terminated by the limestone hills we had passed 
over, and bounded at the side by red sandstone and conglo- . 
merate. We were lodged at a miserable hut, built of stones 
and mud. The single apartment, of which it consisted; 
served us successively for a kitchen, dining-room, and bed- 
room; the dinner was cooked over a turf fire, the smoke from 
which eddied round the roof, and then partially escaped by 
the door-way, which was only about four feet high. 
- At daybreak, on the 28th, when we raised the piece of 
Sooty cloth that served for a door to our dwelling, the whole 
valley was so thickly covered with hoar-frost, that it appeared 
as if snow had fallen in the night. We were delayed more . 
than two hours from some of our mules having strayed to the 
hills. As the beasts are suffered to wander about at night 
po ceras of pasture, an Indian is generally to be found where 
travellers halt, who, for a trifling reward, undertakes to keeP 
them together: he passes the night in the open air, frequently 
