In November 1977, when Thin Lizzy performed "Cowboy Song" live at The Rainbow in London, they were enjoying significant momentum following the release of their acclaimed album, "Jailbreak." Released earlier that year, "Jailbreak" marked a turning point for the band, solidifying their popularity with hits like "The Boys Are Back in Town." This live recording showcases the band's energetic stage presence and era-defining sound, which blended hard rock with elements of traditional rock and roll. The performance at The Rainbow is particularly noteworthy as it captures Thin Lizzy at a peak period in their career, gearing up for the release of their follow-up album, "Lighting to the Nations," scheduled for 1978. This era was marked by the dual guitar harmonies of Brian Robertson and Scott Gorham, a signature element of their music that contributed to their lasting influence in rock history.