The army was organized in three brigades of all arms, at Iquique, Caldera and Vallenar.
At Vallenar in central Chile some of the workmen in extreme years go up to the nitrate pampa; in wet years they return.
At nine o'clock at night, Vallenar the second city of the Province of Atacama was arrived at.
Vallenar is the original home of the patio process for the extraction of silver from the ore by means of crushing.
The streets of Vallenar are narrow, and although lighted with electricity, they are dark.