 When Castelli knew about Moreno's resignation, he wrote a letter to Vieytes, Rodriguez Peña, Larrea, and Azcuénaga, asking them to move to Upper Peru.If they defeated Goyeneche, they planned to march back to Buenos Aires.However, the letter was sent via the common postal service, and the postmaster of Córdoba, Jose de Paz, decided to send it instead to Cornelio Saavedra.