Claim: Young Traveller's sire, King Fergus (1775–1801), a British Thoroughbred racehorse, was an offspring of Eclipse and Creeping Polly.
Evidence: King Fergus King Fergus (1775–1801) was a British Thoroughbred racehorse. He was sired by the undefeated Eclipse. King Fergus was the ninth foal of Creeping Polly, a daughter of Othello. 
King Fergus King Fergus (1775–1801) was a British Thoroughbred racehorse. Eclipse Creeping Polly