ZZ Top was managed by Bill Ham, a Waxahachie, Texas, native who had befriended Gibbons a year earlier. They released their first single, "Salt Lick," in 1969, and the B-side contained the song "Miller's Farm." Both songs credited Gibbons as the composer. Immediately after the recording of "Salt Lick," Greig was replaced by bassist Billy Ethridge, a bandmate of Stevie Ray Vaughan, and Mitchell was replaced by Frank Beard of American Blues. Due to lack of interest from the major American record companies, ZZ Top accepted a record deal from London Records, the American affiliate of the British Decca Records label. Unwilling to sign a recording contract, Ethridge quit the band and Dusty Hill, Frank Beard's American Blues bandmate, became his replacement. After Hill moved from Dallas to Houston, ZZ Top signed with London in 1970. They performed their first concert together at the Knights of Columbus Hall in Beaumont, Texas, on February 10, 1970.