Archibald Smith, Peru as It Is, Volume 2 (of 2)
“ The coca leaf is to the Indian of the interior a necessary of life, which he uses from time to time, to renovate his energy for renewed muscular exertion; and in the intervals of labour he often sits down to chaccha or to refresh himself by masticating coca seasoned with quick-lime, which he always carries about his person in a little gourd. The lime is used in very small quantity at a time, but in a pulverulent and escharotic state. According to the Indian it counteracts the natural tendency of the coca to give rise to visceral obstructions. ”
