Bob Hippard was one of several non-Byrds that wrote songs with Roger McGuinn which appeared on Byrds records. Hippard and McGuinn met in the early 1960s at the Troubadour in Los Angeles, where the musicians that would soon form the Byrds would gather; Hippard at the time was road manager for Hoyt Axton and the folk duo Art & Paul. Hippard is most noted for co-writing (with McGuinn) two of the stranger pieces to appear on the Byrds' psychedelic-minded albums Younger Than Yesterday (1967) and The Notorious Byrd Brothers (1968). On Younger Than Yesterday, there was "C.T.A.-102," its country-rock tune wedded to lyrics about communication with extraterrestrials, complete with passages of speeded up nonsense voices simulating creatures from other planets listening to "C.T.A.-102" over what sounds like a transistor radio. In a similar sci-fi frame of mind was "Space Odyssey," the closer on Notorious Byrd Brothers, whose trad-sounding folk tune was like a sea shanty for outer space exploration, with inventive electronic effects.
Among Hippard's other collaborations with McGuinn were "Stanley's Song," eventually released on the Byrds box set (and as a bonus track on the expanded edition of Dr. Byrds & Mr. Hyde); "Time Cube," which was on McGuinn's first solo album; and "Don't You Write Her Off," a hit in 1979 with McGuinn, Clark & Hillman.