What pen name did C.S. Lewis use for poetry published before his fame?

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

Lewis published Spirits in Bondage in 1919 under the name Clive Hamilton. The book appeared while he was still a young writer and shortly after his service in the First World War. Using a pseudonym allowed him to present the poems separately from his personal identity.

He used the same name for Dymer, a long narrative poem published in 1926. That book was issued before Lewis became widely known as a Christian apologist and before The Chronicles of Narnia made him famous internationally.

The name can be confused with Lewis’s real name, Clive Staples Lewis. “Jack” was his familiar personal nickname, not his poetry pseudonym. Later works, including The Pilgrim’s Regress and Mere Christianity, were published under C.S. Lewis.