Jammu and Kashmir Chief Minister Mehbooba Mufti on Wednesday paid tributes to the martyrs of the 1931 struggle against the Dogra rule and appealed for calm in the violence-gripped Kashmir Valley.Under heavy security, Mehbooba Mufti went to the graveyard at Naqashband Sahib area of Old Srinagar where a guard of honour was presented to her.The Chief Minister appealed for peace in the troubled valley where street clashes since the killing of a top militant, Burhan Wani, on July 8 has left over 30 people dead and hundreds injured.She laid a wreath at the graveyard to commemorate those killed by the Dogra Maharaja's soldiers on this day in 1931 outside the Central Jail in Srinagar.People had stormed the jail during the trial of Abdul Qadeer Khan, an Afghan cook of a British official. Qadeer had been arrested for delivering a fiery speech in support of the Kashmiris.