Conversation so far:
What did Patrick O'Brian publish as Patrick O'Brian?
Patrick O'Brian published A Book of Voyages in 1947 and The Last Pool, published in 1950.
What other pen names did Patrick O'Brian use besides Patrick O'Brian?
Patrick O'Brian published two novels, a collection of stories and several uncollected stories under his original name, Richard Patrick Russ.

Question: Did he write anything besides prose fiction?
Self-contained rewrite: Did Patrick O'Brian write anything besides prose fiction?