After the Empire Games, the Australian team returned home via France, Austria, Germany, Netherlands, Italy and Singapore for a series of competitions. Morgan's best performances were at the Dutch and French Championships, where she came third in the 400-metre events. In 1959, she placed third in both the 440-yard and 880-yard freestyle events at the Australian Championships. Her swimming career was then interrupted by bronchitis, which developed into bronchial pneumonia. The illness forced her to take an extended break. Her chest problems persisted when she returned to competition at the 1960 Australian Championships, placing third in the 220-yard and 440-yard freestyle and fifth in the 110-yard freestyle. She gained selection for the 1960 Summer Olympics in Rome as a member of the 4×100-metre freestyle relay squad. She swam the first leg in the heats, posting a time of 1 minute 5.5 seconds, giving Australia a 1.0-second lead. Australia led at every change and went on to win its heat by five seconds, qualifying fastest for the final. However, Morgan posted the slowest leg of the Australian quartet and was dropped when Fraser and Konrads were brought into the team for the final, in which Australia won silver. Under the rules of the time, heat swimmers were not awarded medals if the final quartet placed in the top three positions. Suffering from periodic chest pain, Morgan retired from competitive swimming in December 1960.