[citation needed] Other early collaborations include Bivouac Jaun, a project recorded by Marshall, Anastasio, and their friend Marc Daubert (who occasionally played percussion with Phish in 1984 and wrote the lyrics to their classic "The Curtain With").

Marshall also was instrumental in influencing The Man Who Stepped into Yesterday, a Phish concept album and song cycle about the mystical land of Gamehendge written by Anastasio and used as his senior thesis at Goddard College in 1987.

Marshall, Anastasio, and friends would meet at The Rhombus, a giant piece of art located in a park next to the Institute for Advanced Study in Princeton, New Jersey, and embark on lengthy songwriting sessions.

In one instance, Marshall wrote the original lyrics to the Gamehendge song "McGrupp and the Watchful Hosemasters" and nailed them to Anastasio's front door.

In mid-November 2010, Marshall joined his longtime friend Trey Anastasio on stage at the historic Richardson Auditorium in Alexander Hall Princeton University bringing them back to their roots.