Like Galindo, John Caddy - trained as an engineer and canon specialist - was able to produce plans, drawings and illustrations to scale cf. Podgorny 2007a; the mission led by Walker, meanwhile, sought to analyze the political situation of Chiapas and Yucatán and weigh up the independentist or annexationist winds in relation to Mexico and other states.
De manera similar a Galindo, John Caddy - formado como ingeniero y cañonero - era capaz de levantar planos, realizar dibujos e ilustraciones en escala Podgorny, 2007a; la misión de Walker, por su parte, procuraba analizar la situación política de Chiapas y Yucatán y sopesar los vientos independentistas o anexionistas en relación a México y otros estados.