These are some excerpt pages that I scavenged from various sources. They primarily relate to
Catemaco.

Estadistica de Vera Cruz, from 1831  - also available at Google Books.

R.J. Andrle's description of Los Tuxtlas, 1964, copied at the Estacion Biologica library, in English

Leon Medel & Alvares - Historia de San Andres Tuxtla - just a few pages, in Spanish.
Los Tuxtlas Library

Scavenged Historical Texts
Sample