In 1777, the assistant pastor of Tamazula, Nueva Vizcaya composed a detailed report on the local geography, climate, natural history, and mineralogy, listing the many plants and animals and few artisans that were present in his rural parish. The overall presentation is frank and rigorous, more like a scientific report than any kind of propaganda appeal. There is no mention of the local church (San Ignacio de Tamazula) nor its diocese (Durango). The Nettie Lee Benson Latin American Collection at the University of Texas has an eight page long typescript copy of an original from the Biblioteca Nacional de España.
The author of the report, Agustín Fernández, labelled each section as "according to the instruction" (con arreglo a la instrucción), "conforming to the instruction" (conforme a la instrucción), "conforming to the instructions" (conforme a las instrucciones), or "conforming to the model" (conforme a la física) of the señor Don Antonio de Ulloa, a prominent naturalist and naval officer. Ulloa was briefly in Mexico in 1777-1778 to command the voyage of the imperial treasure fleet from Veracruz to Cádiz, but it seems more likely that the "instruction" in question was a model of Ulloa's for geographical writing, than a command Ulloa gave anyone.
What reason did assistant pastor Fernández have for writing this sizeable report, and to whom would he have sent it?