[3] Mango's sire, Emilius, won the Derby in 1823 and went on to become a successful stallion at the Riddlesworth stud which was owned and run by Thomas Thornhill.

[13] On 19 September Mango, ridden by the teenager Sam Day, was one of thirteen three-year-olds to contest the Great St Leger Stakes at Doncaster Racecourse.

Shortly after the start Epirus slipped and fell into a ditch at the side of the course, seriously injuring his jockey Bill Scott, who suffered a compound fracture of the collar bone.

[15] In the closing stages, Mango was driven through a gap in the leading rank, settled the race in three strides and won by a length Mr Fairlie's colt Abraham Newland.

Ridden by John Barham Day he appeared beaten in the closing stages but produced a strong finish to win by half a length from Troilus, with Rat-trap third and Dardanelles fourth.

[19] Mango's run of six consecutive wins came to an end at the next Newmarket meeting when he failed to concede fourteen pounds to Velure in the Garden Stakes.

[20] Mango began his four-year-old season at the Craven meeting in April when his owner received a 100 guinea forfeit as George Osbaldeston's Mahometan failed to appear for a two-mile match.

[22] At the next Newmarket meeting Mango won a sweepstakes over the four-mile Beacon Course, but again gave John Barham Day a difficult time, dodging, swerving and "rebeling" against the jockey before winning by two lengths.

[24] After a break of five months, Mango returned to action at the First October meeting but he failed to add to his successes, being beaten by Lord Suffield's mare Arsenic in a five furlong match.