[4] When Jack Jarvis died in December 1968, the five-time champion jockey Doug Smith took over the training of the horses at the stable, with the 23-year-old Michael Stoute as his assistant.

In the 191st running of the Oaks Stakes over one and a half miles at Epsom Racecourse on 7 June the filly was partnered by the South African-born jockey John Gorton and started at odds of 17/1 in a fifteen-runner field.

[7] At Royal Ascot later that month, with Gorton again in the saddle, she was made the 7/4 favourite for the Ribblesdale Stakes[8] and came home five lengths clear of her opponents.

She ran twomore races that year without recapturing her best form, finishing third behind Frontier Goddess and Wenduyne in the Yorkshire Oaks in August and fourth to Aggravate in the Park Hill Stakes in September.

[4] At the end of her racing career Sleeping Partner was retired to become a broodmare at her owner's stud but proved to be barren and produced no known foals.