[5] Mundig was unraced as a two-year-old, but his performances in home exercise gallops and private trial races made him a fancy for the Derby.

He was the subject of heavy betting by the Scott family and by Bowes, although a great deal of secrecy surrounded his form, making him a very "dark horse".

[7] Ridden by Bill Scott, the brother of his trainer, Mundig started at odds of 6/1 in a field of fourteen runners for the Derby on 3 June.

Heavy rain had made the ground soft and muddy, but did not deter the usual huge crowds who were entertained between races by "conjurors, learned donkies, posture masters, Punchinellos &c".

The closing stages saw four horses enter the final furlong almost level: Ascot and Lord Jersey's Ibrahim raced along the inside rail, while Mundig and the 100/1 outsider Pelops ran up the stands side.

[6] According to the Court Journal, Mundig's win was greeted with great celebrations by his Northern supporters who waved impromptu flags and left the course crying "Yorkshire for ever!

"[9] Mail coaches passing through Yorkshire blew horns and flew flags in John Bowes black racing colour to mark Mundig's victory, leading one vicar to believe that the King must have died.

[10] Following his very hard race at Epsom, Mundig did not appear again until 15 September when he ran in the Great St Leger at Doncaster before a large and fashionable crowd which included Princess Victoria.

[12] On his first appearance as a four-year-old, Mundig ran in the Tradesmen's Cup, a handicap race at Liverpool in July and finished unplaced behind Birdlime.

[16] The Sportsman magazine took a different view, describing Mundig as essentially "true as steel", but ruined as a racehorse by his excessively hard race in the Derby.

Several later sources claim that Mundig, an unusually well-developed colt who arrived at Epsom surrounded in secrecy, may have been a four-year-old, the suggestion being that Emma's 1832 foal had been switched with his 1831 sibling.

Mundig's early progeny were disappointing runners[20] and in 1843 he was sold for 400 guineas to Captain von Kotze, a Prussian breeder.