Who cares for Demetri during his gunshot-induced sickness in the book, The Underdogs a Novel of the Mexican Revolution?

Remigia is the kindly old lady in an unnamed mountain ranch town who takes Demetrio in and cares for him during his gunshot-induced sickness. Having no real medical knowledge, she depends on voodoo remedies, like spreading warm pigeon entrails on the sufferer's stomach to reduce fever.