Brothers Thomas (c. 1840—25 June 1867) and John Clarke (c. 1846—25 June 1867) were Australian bushrangers from the Braidwood district of New South Wales. They were responsible for a series of high-profile robberies and murders which led to the embedding of the Felons' Apprehension Act (1866), a law that introduced the concept of outlawry and authorised citizens to kill bushrangers on sight. Active in the southern goldfields from 1865, Thomas, John, their brother James and several other relations were responsible for a reported 36 hold-ups and the deaths of five policemen—four of them bounty hunters looking to bring them in. Some modern-day writers have described the Clarkes as the most bloodthirsty bushrangers of all. They were captured during a shoot-out in April 1867 and hanged two months later at Sydney's Darlinghurst Gaol. Their execution ended organised gang bushranging in New South Wales.