By February 1808 "Thais" was back at Plymouth and undergoing refitting as a sloop, a process that took into April. On 21 January 1809 "Thais" was at Cape Town. There Admiral Bertie, admiral in charge of the Cape of Good Hope Station, sent her out to look for "Diana", which had been reported damaged, and for the East Indiamen "Experiment", "Glory", and "Lord Nelson", which were overdue. It turned out that the three East Indiamen had foundered without a trace. Later in 1809 "Thais" served in the North Sea. In August "Thais" was part of a squadron under the command of Sir Home Riggs Popham in the Scheldt during the Walcheren Campaign. On 23 May 1810 she escorted a convoy to the Mediterranean.