Vargas Matías, S.A. 2020. Signals in time: The optical telegraphy project of Bonifacio de Tosta of the route by Xalapa of the Camino Real de Veracruz, 1811-1820. Letras Históricas E-ISSN: 2448-8372. 23 (Aug. 2020). DOI:https://doi.org/10.31836/lh.v0i23.7249.