CARLSON, Carl Arthur Of Concord, formerly of Lexington, Dec. 3, 2011. Husband of Randi Carlson (Nilssen). Father of Ellen Randi Carlson of Maynard and Paul Arthur Carlson of Watertown. Brother of William Carlson of Hanover. Carl is also survived by 2 grandchildren, Carl Nilssen and Jorie Agnes, and by many nieces and nephews. Systems Engineer in the communications field. A Funeral Service will be held Tuesday Dec. 13 at St. Paul Lutheran Church, 929 Concord Turnpike in Arlington at 11am. Relatives and friends are kindly invited to attend. Visiting Hours at the Douglass Funeral Home, 51 Worthen Rd. Lexington Monday from 4pm to 8pm. Interment private.