What was the pen name C.S. Lewis used for his early poetry?

C.S. Lewis used the pen name Clive Hamilton for his early poetry.

Under that name, Lewis published Spirits in Bondage in 1919 and Dymer in 1926. The first collection appeared while he was still a young writer and had recently returned from military service in the First World War. Dymer was a long narrative poem written in a deliberately archaic style and was issued anonymously apart from its pseudonymous attribution.

Lewis later became far better known for prose, including literary criticism, Christian apologetics, and imaginative fiction. His use of a pen name helped separate these early poetic experiments from the academic and religious writing that established his reputation.

A second pseudonym, N.W. Clerk, was used for The Pilgrim’s Regress in 1933. N.W. Clerk was also the name attached to the book’s introduction, while Lewis’s later works generally appeared under his initials or full name. These pseudonyms are therefore associated with different phases of his career.