Built at North Sidney, Cape Breton.
Owners: 1836 W Brown, Troon; 1848 Thomas Robson (Stockton-on-Tees) Newcastle-on-Tyne; by 1852 Robert Pritt, Newcastle-on-Tyne; 1852 Robert Hall, Hartlepool; June 1852 Robert Hall, Thomas Drysdale & Robert Wilson, Hartlepool; July 1853 Ebenezer Septimius Jobson, George Geipel & Thomas Twidale Drysdale, Hartlepool.
Masters: 1836-37 Cuthbert; 1848-52 Thomas Robson; June 1852-53 Robert Wilson; 1853 Thomas Fairburn.
Thetis was wrecked on 2 October 1853 at Dolgoiness behind Krasnoi Gorka on the Russian coast. No lives lost. On the Hartlepool Customs House Register date & place of loss given are slightly different