British tanker Tornus bound for England according to a letter of the German naval attaché at Istanbul dated 12 January 1940

In his letter dated Istanbul, Turkey 12 January 1940 No. 632g. reported the German naval attaché to the Oberkommando der Wehrmacht Abteilung Ausland the ships passing Istanbul coming out of the Black Sea and loaded with contraband for or chartered by the enemy. An item mentioned on 10 January the British tanker Tornus loaded with 10,480 gasoline bound for Avonmouth, England.  

Source

Bundesarchiv. German Marineattaché for Turkey, Greece, Romania and Bulgaria 1939-1941. RM 12-II/459.