He was the son of Mary Ann Rollinson and Richard Whittingham. He married Jane Harrison. His sister was married to Rev. Olssen of Scarsdale, NY. It is there that AMW became acquainted with both brothers.
He graduated from the General Theological Seminary of New York City in 1821. He was ordained deacon of the Protestant Episcopal Church in 1827, and priest in 1829. He was the Rector of St Mark's Church at Orange, NY, until 1831, and of St. Luke's, New York City, 1831-35. He was Professor of Ecclesiastical History in the General Theological Seminary, 1836-40, and was consecrated Bishop of Maryland, in 1840, in St. Paul's Church, Baltimore, MD. He was the founder of St. James's College, Hagerstown, MD; the Church Home and Infirmary at Baltimore, and the Sisterhood of St John in Washington, D.C. He received the honorary degree of LL.D., and also A.M. and S.T.D., from Columbia in 1827, and 1837 respectively.
Who Was Who in America, 1963, p. 578.