CARL RUSSO/Staff photo. Reenactment participants in The Famous Olde Sixth Company I Massachusetts Militia of Lawrence Mass. from left, Sean Sweeney of Lawrence; Christian Padron of Lawrence; flag bearer, Morrgan Sweeney-Charlton, 17 and a sophomore at Central Catholic High School and Joe Bella of Methuen demonstrate a formation used to put down a mob while visiting the graves of Sumner Needham and his widow, Hannah in Lawrence's Bellevue Cemetery. Sumner was a member of the Sixth Co. I Mass. Militia when he was killed by a secession mob in Baltimore in April, 1861. The militia was traveling through Baltimore on its way to Washington to defend the capital at the start of the Civil War. The Lawrence militia members will travel to Baltimore on the weekend of April 16th. to participate in events to commemorate the 150th. anniversary of the Civil War and the mob attack on the Militia that killed Sumner. 4/13/2011.