PERU. 277 
On the east of the Zauricocha is the district called Arenillapata, 
in which few mines are now worked ; the ore which is produced, 
although abundant in particular spots, is not rich. 
Immediately within the town there are some few mines that are 
good, but there has never been any extensive work carried on, and it 
is believed that ore yet remains to be discovered. 
Cayac, another district lying north of Zauricocha, is worked to 
some profit; the upper adit from the northwest reaches it, and 
several mines have been producing good results. 
To the north of Cayac are the Chucarillo and Zauacancha dis- 
tricts, the working of the mines in which has been impeded by water 
ever since the breaking out of the revolutionary war. The upper 
adit, leading from the gully of Rumiallana, is above them, and they 
derive no benefit from it. 
To the north of these last two districts lies the plain of San Juan; 
there are some small veins running through some parts of it, but no 
important discovery has yet been made, although many mines have 
been opened and carried down to depths of from one hundred and 
twenty to one hundred and fifty feet. The lower adit, from the 
gully of Rumiallana, is to run through it, and may open to the 
proprietors some discoveries to recompense them for their labour. 
The whole number of mines considered rich in the different 
districts, may be enumerated as follows : 
In Zauricocha 12 to 14. 
Santa Rosa 20 to 25. 
Cayac 10 to 12. 
Chucarillo 5 to 6. 
Zauacancha 10 to 12. 
Each of these mines comprises a space of one hundred and eighty 
feet long by ninety feet wide. 
The silver ores are estimated by a measure called a box of ore, 
which contains twenty-five mule-loads of ten arrobas or twenty-five 
pounds each. Each box varies in value from six Spanish marks to 
three thousand ; the former being the lowest which, under the most 
favourable circumstances, will pay the cost of working. The poorest 
is of course the most abundant. 
The miner who can raise ores in considerable quantities, which 
will give ten to twelve marcs per box, does well. 
vol. i. 70 
