of timing, often using the guitar as a part of his harmonic phrasing, particularly on "Dark Was the Night, Cold Was the Ground". By most accounts, including one by the reputable blues guitarist Blind Willie McTell, Johnson used a knife as a slide, but other claims by Harris and the bluesman Thom Shaw also state he used a thumb pick or brass ring on his recordings. The music historian Steve Calt said of Johnson's style: "opposed to other bottleneck artists he varies the speed of his vibrato drastically, often speeding up as he slides into a note. He is also one of the few bottleneck artists with the ability to consistently sound 3 or 4 discreet melody notes upon striking a string once, a skill that reflects uncanny left-handed strength, accuracy and agility". Johnson sang in a harsh, gravelly bass voice that was meant to be powerful enough to be heard by passersby on the streets. His vocal interplay was described by the blues writer Mark Makin as "fierce" and "not unlike the 'Hell and Damnation' of a Baptist preacher such as a fired-up Reverend A. W. Nix". On some instances in his recordings, Johnson also delivered vocals in his natural tenor voice. The only known influence on Johnson's singing style is the blind musician Madkin Butler, who, like Johnson, sang his religious message on the streets of Texas cities. Legacy Johnson's music was revived in the 1960s thanks in large part to his inclusion on Harry Smith's Anthology of American Folk Music in 1952 and the efforts of the blues guitarist Reverend Gary Davis, a highly regarded figure in New York's blossoming folk scene. As he taught Johnson's music to young musicians, groups and acts like the Soul Stirrers, the Staples Singers, Buffy Sainte-Marie, Fairport Convention, and Peter, Paul and Mary covered or re-interpreted his work. In November 1962, Bob Dylan recorded a rendition of "Jesus Make Up My Dying Bed", retitled "In My Time of Dying", for his self-titled debut album. Rock bands and artists of the 1970s also covered Johnson's songs, including Led Zeppelin, John Sebastian, and Eric Clapton. Alligator Records released the tribute album God Don't Never Change: The Songs of Blind Willie Johnson produced by Jeffrey Gaskill in 2016 with covers by various artists including Tom Waits, Lucinda Williams, Sinead O'Connor and Derek Trucks and Susan Tedeschi. The album was nominated for two Grammy Awards: