 In 1829, he published "The Progress and Suppression of the Reformation in Spain in the Sixteenth Century," a sequel to "The History of the Reformation in Italy" during the same period.As a proof of his indefatigable diligence and zeal in the study of history, it may be mentioned here, that to make himself fully acquainted with the two last subjects, he had mastered, in the decline of his days, the Spanish and Italian languages, that he might study the proper authorities from their original sources.While Dr. M'Crie was thus occupied, the bill introduced in 1829 for the emancipation of Roman Catholics from political restrictions, and their admission into places of authority and trust, was passed.