By the time Mimosa made the voyage she was already past her prime, having been built in 1853 at Hall's shipyard in Aberdeen.
Mimosa sailed from Liverpool, England on May 28, 1865 to Patagonia, South America with a group of about 153 passengers with Captain George Pepperell and a crew of 18. Thomas Greene, an Irishman from Kildare, had been appointed as ship's surgeon.