“You can almost hear the music in your head when looking at these photos”: How legendary photographer Jim Marshall captured the essence of the Grateful Dead and documented the rise of the ultimate jam band

The Grateful Dead: Pigpen [left] and Jerry Garcia in action at Santa Clara County Fairgrounds in San Jose, May 18, 1968.

Photographer Amelia Davis is the former assistant to the legendary Jim Marshall, best-known for capturing shots of Jimi Hendrix, Bob Dylan, Johnny Cash and many others.

In the late ’60s, Marshall lived in San Francisco, where he was part of the creative family around the Grateful Dead.