In autumn 1979, Banks and Rutherford moved in with Collins in Shalford to start rehearsals on "Duke". Collins had written a large number of songs, but he felt many of them would not suit Genesis, while Banks and Rutherford were short of material having just recorded their solo albums. The three decided each member should contribute two of their own songs for the band to work on. Banks put forward "Heathaze" and "Cul-de-Sac", Rutherford used "Man of Our Times" and "Alone Tonight", and Collins had "Misunderstanding" and "Please Don't Ask". The remainder of the songs were written together in rehearsals. Banks later regretted not choosing Collins' "In the Air Tonight" for the album. His track "Cul-de-Sac" became a problem for Collins to get into as its overall style and lyrical content no longer interested him, and realised that he should have kept the song for his solo output.