Under what pen name did C.S. Lewis publish The Pilgrim’s Regress?

C.S. Lewis published The Pilgrim’s Regress under the pen name Clive Hamilton.

The Pilgrim’s Regress: An Allegorical Apology for Christianity, Reason and Romanticism was Lewis’s first published work after his conversion to Christianity. It appeared in 1933 under “Clive Hamilton,” a name formed from his first name and his mother’s maiden name, Hamilton.

The book is an allegorical journey inspired partly by John Bunyan’s The Pilgrim’s Progress. Its protagonist, John, travels through a landscape representing competing philosophies, desires, and religious positions. The subtitle signals Lewis’s attempt to defend Christian belief while also exploring the longing he called “joy.”

Lewis later became famous under his initials, C.S. Lewis, but Clive Hamilton was an important early publishing identity. He used another pseudonym, N.W. Clerk, for the 1964 memoir Letters to Malcolm: Chiefly on Prayer, so the two names should not be confused.