Could it be this ship? "That according to the declaration of the engineer of the Chilean Navy, Mr. John MacPherson, the "Tornado," formerly the "Pampero," was built for the Confederates; it is supposed that at the termination of the civil war in America, as she could not fulfill her object of damaging the North American trade, like the "Alabama" and other famous privateers, she remained inactive until the agents of the Chilean Government in England cast their eyes on her with a view of sending her to cruise against the commerce of Spain."

See link below.

Ed