Robert Nighthawk recorded for United on it's first day of sessions and two of United's first five releases were by "Robert Nighthawk and his Nighthawks Band". He had a national hit in late '49 on Aristocrat and perhaps United had envisioned Nighthawk as it's blues-singing slide guitar rival to Chess' Muddy Waters. Sales didn't pan out but to many he was the ultimate slide guitarist of the amplified blues era, one who influenced the likes of Muddy Waters, Elmore James and Earl Hooker. B.B. King cited Nighthawk as one of his "Ten Favorite Guitarists" in "Guitar Player" magazine. Today, more than 30 years after his death, Nighthawk is ranked among the greats in blues history.