Inman's subsequent service career was principally in frigates: he was engaged at the Siege of Toulon in HMS "Aurore", in a raid at Dunkirk in HMS "Andromeda" and participated in the Battle of Copenhagen as captain of HMS "Désirée". He later served on the ship of the line HMS "Triumph" at the Battle of Cape Finisterre and was subsequently called to give evidence at the court martial of Sir Robert Calder. After the battle off Finisterre, Inman suffered from ill-health and remained on shore duty until 1809 when he was appointed as Admiralty commissioner for Madras. The lengthy sea journey to India exacerbated his existing health problems and he died just ten days after his arrival.