An account of the conversion of the Reverend Mr. John Thayer [electronic resource] : lately a Protestant Minister, at Boston in North-America, who embraced the Roman Catholic religion at Rome, on the 25th of May, 1783. / Written by himself. ; To which are annexed, several extracts from a letter written to his brother, in answer to some objections. ; Also, a letter from a young lady lately received by him into the church, written after making her First Communion. ; [Two lines from Psalms]