BHAI MEWA SINGH,  He was active in canada promoting Ghadar activities,  He killed Hopkinson  a British official  in court  of  vancouver as revenge because  on his instigation ,police agent Bela singh shot deat  Bhai Bhag  singh and  Bhai Badan singh in the Gurudwara at Vancouver when they were in prayers . He was arrested and tried and was hanged at Vancouver jail on 11 jan 1915 in Canada.