According to Stevenson (1968), pp. 306-312: "...Fray Gregorio de Zuola [was] a Franciscan who, after serving some dozen years at Cochabamba in what is now Bolivia (1666-1678), was transferred to the doctrina (Indian mission) of Urquillos near Cuzco and thence, in the 1690's, to the Cuzco motherhouse, where he died on November 28, 1709. He left his 500-page commonplace book to his cousin-in-law, Matías Ramos Delgado of Cuzco, who rose from being a captain to a general (d. 1725). For that matter, all Zuola's Cuzco relations were gentry (in his commonplace book he noted the deaths of two ladies of quality at Cuzco, one of whom was his niece, the other his cousin)". The "Codex Zuola" (RA-BAmrr "Codex Zuola) contains eighteen pieces (17 in Spanish and 1 in Latin); according to Stevenson, at least the latter one, a Credo Romano, could have been composed by him.