I'd been talking off my co-worker Gerry Kane's ear about treasure hunt games. And he mentioned that he'd participated in something tangentially related: the Hash House Harriers. These people play a game of follow-the-leader in which the followers can't see the leader, but figure things out from chalk marks and flour dabs on the ground. And so a bunch of chasers go running around the city, calling out to each other when they think they're back on the trail of the chasee. And they drink a lot. I was pleasantly surprised a week later when I spotted this chalk circle on the UCSF campus. With the letters inside SFH3, I figured that I suddenly had proof of the existence of a San Francisco Hash House Harrier group, and knew what their symbol looked like.