In an interview in 2008 with Mojo, when asked who had composed Echoes, Wright stated he had composed the long piano intro and the main chord progression of the song, in the same interview he confirmed that Waters wrote the lyrics.
He had composed the long piano intro. This was in the same interview. This was what Wright stated in an interview in 2008 with Mojo. He had composed the main chord progression of the song. This was in the same interview. This was what Wright stated in an interview in 2008 with Mojo. Waters wrote the lyrics the same interview. He confirmed this.