They crawl out of the muddy swamps from time to time to make their eerie sounds, like mating calls of some slimy lizard-like fish. Fingerpickin' acoustic guitar and slide Dobro from Delta and Piedmont blues styles and a variety of early blues originating across America from artists such as Robert Johnson, Muddy Waters, Elmore James, Blind Lemon Jefferson, Mississippi John Hurt, Blind Willie McTell, Rev. Gary Davis. Piedmont and Delta blues from two long-timers. Acoustic guitar, slide guitar, dobro, and harmonica.