a Roman Catholic clergyman, was a native of Ireland, where he enjoyed a high reputation as a preacher. About 1800 he came to New York, and was attached to St. Peter's Church. He afterwards left New York in consequence of difficulties which arose, and died in Baltimore, October 20, 1816. Dr. O'Brien published Sermons on the Most Important Subjects of Morality and Religion (Cork, 1798). See De Courcy and Shea, Hist. of the Catholic Church in the United States, page 351.