Graham Gouldman, who later formed the band 10cc, wrote this song. Gouldman was a prolific songwriter who also provided the Yardbirds hits "For Your Love
" and "Heart Full of Soul
." The Yarbirds were skilled songwriters and composed most of their own material, but Gouldman's songs brought a moody sound they were able to turn into a hit record. When Songfacts asked their drummer, Jim McCarty
, about recording the songs of another writer, he said, "There wasn't a problem doing that. It was the sort of thing that you relied on to get into that other echelon, to have a hit song. All our contemporaries were having hit songs: The Beatles and the Stones and the Moody Blues and Animals, they were all having #1 hits and we were really trying to keep up."