The image is seared into our collective imagination: Yoko Ono and John Lennon, draped in white robes, reclining during their 1969 Bed-In protest against the Vietnam War in a Montreal hotel suite.

I’m sure it comes as swiftly to your mind’s eye as it does to mine. Still, there’s a good chance you’ve overlooked something—or someone. Look again. Let your eye wander. In the foreground, nearly centered in the shot, is a striking brunette. She sits beside her husband, the silver-haired acid guru Timothy Leary, who smiles wide, clapping and singing along to the song Lennon and Ono recorded on-site: “Give Peace a Chance.”