Multiple, Dictionary of National Biography… (1927)
“ From his boyhood Cook was a keen politician and a strong liberal. He was president of the Oxford Union in 1879 and enjoyed the reputation among his contemporaries of being an extremely accomplished and resourceful debater. After leaving Oxford he was for a time secretary of the London Society for Extension of University Teaching, and gradually found his way into journalism by means of contributions to the Pall Mall Gazette, then under the editorship of John (afterwards Viscount) Morley. In 1883 William Thomas Stead [q.v.] became editor, and shortly afterwards invited Cook to join the staff. ”
