A number of surveying instruments, hidden in the folds of his garments, allowed him, at the constant risk of being caught, to make observations and take notes on this still unexplored country.
Varios instrumentos de medida, que disimula entre los pliegues de la ropa, le permiten, aun a riesgo de ser sorprendido, realizar observaciones y tomar notas sobre ese país todavía desconocido.