This is how my day went today: A friend on Facebook (John Baumbach) posted a link to a page listing the 20 Essential Grateful Dead Shows. He mentioned how he had been to two of them. This got me thinking about one of my most memorable concerts. I did some searching, and found an archive page with a recording of the Bob Weir concert during my freshman year at Franklin Pierce College on March 4, 1978. Surprised to find this online, I thought: “Maybe there’s an archive of old Grateful Dead concerts, too”. A little more searching led me to the…