sentences:  Castelli intercepted as well a mail from Nieto to Gutiérrez de la Concha, governor of Córdoba, which was already executed for his support to Liniers.This mail mentioned a royalist army led by Goyeneche advancing over Jujuy.Balcarce, who had advanced to Potosi, was defeated by Nieto in the Battle of Cotagaita, so Castelli sent two hundred men and two cannons to strengthen his forces.