Scobell often used his membership in the "Legal League," a clandestine Negro organization in the South supporting freedom for slaves, to acquire local information. League members sometimes supported Scobell's collection activities by acting as couriers to carry his information to Union lines. On at least one occasion, as described by Pinkerton, Scobell protected the escape of Mrs. Lawton from pursuing Confederate agents. He worked for Pinkerton from late 1861 until the intelligence chief closed down his operations in November 1862, when McClellan was replaced by Gen. Ambrose E. Burnside.