Slaves had been part of the "engine of war" for the Confederacy. They produced and prepared food; sewed uniforms; repaired railways; worked on farms and in factories, shipping yards, and mines; built fortifications; and served as hospital workers and common laborers. News of the Proclamation spread rapidly by word of mouth, arousing hopes of freedom, creating general confusion, and encouraging thousands to escape to Union lines. George Washington Albright, a teenage slave in Mississippi, recalled that like many of his fellow slaves, his father escaped to join Union forces. According to Albright, plantation owners tried to keep the Proclamation from slaves but news of it came through the "grapevine". The young slave became a "runner" for an informal group they called the "4Ls" ("Lincoln's Legal Loyal League") bringing news of the proclamation to secret slave meetings at plantations throughout the region.