Chicago blues is a form of blues music developed in Chicago, Illinois, in the 1950s, in which the basic instrumentation of Delta blues—acoustic guitar and harmonica—is augmented with electric guitar, amplified bass guitar, drums, piano, harmonica played with a microphone and an amplifier, and sometimes saxophone. The best-known Chicago blues musicians include singer-songwriters and bandleaders Muddy Waters, Howlin' Wolf, and Willie Dixon; guitar players such as Elmore James, Luther Allison, and Buddy Guy; and harp (blues slang for harmonica) players such as Little Walter, Paul Butterfield, and Charlie Musselwhite. Since the 1960s, the Chicago blues style and sound has spread around the US, the UK and beyond. A Alberta Adams (July 26, 1917 – December 25, 2014). In 1952, she signed a recording contract with Chess Records and recorded with Red Saunders for the label. She toured with Duke Ellington, Eddie Vinson, Louis Jordan, Lionel Hampton, and T-Bone Walker, among others. Linsey Alexander (born July 23, 1942, Holly Springs, Mississippi). Moved to Chicago in 1959, where he was active in the South Side music scene and became one of the hardest-working bluesmen in Chicago. He is known for his strong voice and guitar with his own style of electric blues. His album Been There Done That, recorded by Delmark Records in 2012, has been critically acclaimed as pure blues of the finest quality. Luther Allison (August 17, 1939, Widener, Arkansas – August 12, 1997). Moved to Chicago as a teenager and became a major force in the blues scene there, primarily as an electric guitarist and also as a singer. He released many albums for Alligator Records, based in Chicago. Kokomo Arnold (February 15, 1901, Lovejoy's Station, Georgia – November 8, 1968). Slide guitarist and vocalist who began his career in New York City and moved to Chicago in the latter half of the 1920s. He stopped recording for good in 1938, because he was not making a livable wage performing. His first recording was for Decca Records. Several compilation albums of his work have been released, such as those issued by Document Records. B Chico Banks (March 7, 1962, Chicago – December 4, 2008). Released one album in 1997 for Evidence Records and played with many other blues musicians. L.V. Banks (October 28, 1932, Stringtown, Mississippi – May 2, 2011). Moved to Chicago in 1965 and released two albums for Wolf Records. George Barnes (July 17, 1921, South Chicago