Queen"s University Belfast. Trinity College.
He is known particularly for English translations of apocryphal and pseudepigraphal works, and editions including Jubilees (1895), the Book of Enoch (1906), and the Testaments of the Twelve Patriarchs (1908) which have been widely used. He wrote the articles in the 1911 Encyclopædia Britannica attributed to the initials "R. H. C.". He gained a Doctor of Divinity and became Professor of Biblical Greek at Trinity College.
He also became archdeacon of Westminster in 1919, serving until his death in 1931.
He is buried in Westminster Abbey.