Guitarist Wall Matthews, the last surviving member of the experimental 1970s collective Entourage, was part of a group celebrated for their bold musical innovations on two rare Folkways LPs. Sampled by Four Tet and revered over the years, Entourage’s legacy saw renewed interest with Tompkins Square's 2018 release Ceremony of Dreams: Studio Sessions and Outtakes, 1972-1977. Now, Spine River: The Guitar Music of Wall Matthews, 1967-1981 presents a collection of Matthews' unreleased and rare tracks. This volume will be issued as a limited-edition LP, alongside four digital releases spanning his career.