In a career that lasted from July 1885 to September 1886 the filly ran fifteen times and won eight races at distances ranging from five furlongs to one and three quarter miles.

As a two-year-old in 1885, Miss Jummy won three times from seven starts, but when tried in the highest class she was unplaced behind the future Triple Crown winner Ormonde in the Dewhurst Stakes.

At stud Petrarch was particularly successful as a sire of fillies: his other daughters included Busybody (1000 Guineas and Oaks) and Throstle (St Leger).

[1] Her dam, Lady Portland, was not a successful racehorse but was descended from Alice Hawthorn, who won fifty-two races and became an influential broodmare.

[3] The filly was trained at Lordship Farm in Newmarket, Suffolk by Richard Marsh[4] and was ridden to her most important victories races by John Watts.

[8] Two weeks later, Miss Jummy returned to Newmarket for the Houghton meeting and started second favourite behind the unbeaten colt Ormonde in the seven furlong Dewhurst Stakes.

When the race began the outsider Sagitta rushed to the front and opened up a lead of twenty lengths before tiring rapidly after half distance.

Miss Jummy increased her advantage in the final furlong and comfortably held the challenge of Argo Navis to win the £3,250 prize by one and a half lengths; Jewel Song finished a head in front of Modwena to take third place.

[12] Nine days after her victory at Epsom, Miss Jummy was sent to France to contest the Grand Prix de Paris at Longchamp Racecourse.

[16] On 16 September, Miss Jummy started the 6/4 favourite for the Park Hill Stakes over the St Leger course and distance in which she was set to concede six pounds to her principal opponents Argo Navis and the Yorkshire Oaks winner Philosophy.