Nash told "Disc" magazine, "I can't take touring any more. I just want to sit at home and write songs. I don't really care what the rest of the group think." After relocating to Los Angeles, he joined with former Buffalo Springfield guitarist Stephen Stills and ex-Byrds singer and guitarist David Crosby to form one of the first supergroups, Crosby, Stills & Nash, which released "Marrakesh Express" as its debut single. The B-side of "Listen to Me" was "Do the Best You Can", the last original recording of a Clarke-Hicks-Nash song to appear on a Hollies record (although "Survival of the Fittest", written by Clarke-Hicks-Nash, was re-cut with Terry Sylvester and issued as a US single in 1970). Graham Nash was replaced in the Hollies in January 1969 by Terry Sylvester, formerly of the Escorts and the Swinging Blue Jeans. Sylvester also substituted for Nash as part of the group's songwriting team, with Clarke and Hicks. As planned before Nash's departure, the group's next album was "Hollies Sing Dylan", which reached the No.3 position on the UK chart while the US version, "Words and Music by Bob Dylan", was ignored. Nash's departure saw the Hollies again turn to outside writers for their single A-sides, but the group's British chart fortunes rallied during 1969 and 1970, and they scored four consecutive UK Top 20 hits (including two consecutive Top 5 placings) in this period, beginning with the Geoff Stephens/Tony Macaulay song, "Sorry Suzanne" (Feb. 1969), which reached No.3 in the UK. The follow-up was the emotional ballad "He Ain't Heavy, He's My Brother" written by Bobby Scott and Bob Russell, which featured the piano playing of Elton John; it reached No.3 in the UK in October 1969, and No.7 in the US in March 1970. The next album "Hollies Sing Hollies" did not chart in the UK, but did well in the USA—where it reached No.32 after being retitled "He Ain't Heavy, He's My Brother" and including that song—and in Canada. The Hollies' next single, "I Can't Tell the Bottom from the Top", again featured the young Elton John on piano and reached UK No.7 in May 1970, charting in twelve countries.