By this point in time, Led Zeppelin's popularity was such that the group had reached top billing, sharing that honour for some of their gigs with established acts such as Julie Driscoll, Delaney & Bonnie and Three Dog Night.[1] They were now receiving four times the money that they had previously commanded on their first tour of America just a few months earlier.[2] Also, the band for some of its performances was one of the first groups to give single bill concerts without an opening act.[3] However, for the band's concert at Columbia, Maryland, on 25 May, manager Peter Grant agreed for Led Zeppelin to receive second billing in support of The Who. This was the only time that these two English bands ever performed on the same bill.[1][4]
During this tour the band took time out to record tracks at various recording studios for their forthcoming album, Led Zeppelin II. Many of the tracks were later mixed down by Eddie Kramer at A&R Studios, New York City.[5]
