We lived down at the Mill Camp,which is known as Viloca. 
it is in a deep valley,xh with mountains rising on eithe: 
side of it up to at least 16,500 feet. At the head 
of this valley are large glaciers and snow capped p^^fc; 
peaks rising to perhaps 18,000 feet. There is a trai^rui 
running up the valley and crossing the divide at about 
17,000 feet,then dropping down on east side of range to 
the Caracoles mine,a distance of'about 7 hours on foot. 
There are several of these long,deep valleys radiati: 
ing from a group of high,snow-capped peaks,all having 
glaciers sc in their upper portions and furnishing water 
for nower and irrigation below. The work here was done 1 
in three of these valleys,viz: The Viloca valley,up to 
the divide; the next valley to the west,which is shorterl 
but broader,and ends abruptly in a jumble of huge pinnaef 
cles at its head. However in this valley,between 
about 14 and 15,000 feet many birds were found,especia¬ 
lly Muscisaxicola (five species),Diuca and Idiopsar. 
Chalcostigma olivacea was seen here(a pairjbut not^ 
secured. The other valley worked was to the east of 
Viloca,a very long valley,heading up near the divide 
going, to Caracoles. I made but one trip up this valley, 
going around the mountain on a level about 4 miles to 
enter it,then worked up to its head(it contains two 
lakes,one artificial),then by mistake crossed over WL 
the divide and down on east side of range to a sroall^ 
mine called Los Nevados,at about 15,000 feet,arriving 
there at 3 P.M. I found out where I was,secured a bit of 
food and returned up over the pass,down the same valley 
about a mile,then climbed abruptly up over another div¬ 
ide and dropped down into a branch of the Viloca valley 
which led me straight down to the camp,where I arrived 
at 7 P.M.,just dark and very foggy. It was a tremendous 
days tramp,for three times I climbed up to nearly 
17,000 feet. Only 13 birds were secured,the best being 
a o pair of Chalcostigma olivacea. I was surprised to 
find so few species in this region. Ho Tinamous were 
seen,although I think I heard one whistle. No Thinocorys 
or Attagis and no Phegornis wereseen. All collecting 
labelled Viloca was done above 14,000 feet,and only 19 
suedes collected (one new: Asthenes heterura). 
In addition to the 19 species collected,nine others 
were observed: (see lest). The weather while here 
(March 23 to 28) was very foggy for the most part,with 
occasional showers, There were intervals of sun 
at most any hour of the day. In the evenings the 
higher altitudes were usually clear(above 14,500 feet) 
while lower down in the valley(towards Tanapaca) 
it-was usually sunny,or scattered clouds,and no rain. 
The mountain slopes around here are mostly covered 
