Writing on the Wall – A Hampden gallery proves hippie posters are works of art.

Mesmerized, Glen Trosch gazed at— and on some level into—a Grateful Dead concert poster.

To Trosch, then a 20-year-old Baltimorean in San Francisco to see his favorite band perform on New Year’s Eve 1983, it was an artistic revelation, a two-dimensional window into the three- dimensional world of psychedelic drugs and rock and roll.

He was blown away.

(Click here to download the PDF)