Murray, Kokomo Arnold (1901-1968) was a left-handed slide guitarist, who played his guitar laying it flat across his lap. There are a number of collections of his work out on various labels: Master of the bottleneck guitar (1987) Kokomo Arnold 1930-1938 (1990) Down and Out Blue (1990) Old Original Kokomo Blues (1997)He also played with Peetie Wheatstraw and Casey Bill and there are various compilation albums of these collaborations. His influence on Robert Johnson is most obvious on Sagefield Woman Blues, Milkcow Blues and Old Original Kokomo Blues.
Hope that helps
Brian.