They were to provide continuous labor for the coastal guano mines and especially for the coastal plantations where they became a major labor force (contributing greatly to the Peruvian guano boom) until the end of the century.
Mereka harus memberikan pekerjaan yang berlanjut untuk tambang-tambang guano pantai dan khususnya untuk perkebunan-perkebunan pantai; di sana mereka menjadi tenaga kerja utama (banyak menyumbang bagi boom Guano Peru) hingga akhir abad itu.