In this context, Castelli and Álzaga plotted to oust Liniers and constitute a local government Junta, similar to those of the metropoli. This project was not shared by most of the natives or by the head of the Regiment of Patricians, Cornelio Saavedra. Manuel Belgrano proposed as an alternative to support the plans of Princess Charlotte, which were supported by Castelli and other criollos. Belgrano, who held monarchist ideas, argued that the Carlotist project would be the most practical means of achieving independence from Spain in the circumstances. On 20 September 1808, Castelli wrote a letter to Charlotte, with the signatures of Antonio Beruti, Hipólito Vieytes, Belgrano, and Nicolás Rodríguez Peña.