Langdon Chart

The Langdon Chart was a map of the sexual liaisons Bay Area fan Kevin Langdon knew about in the San Francisco Bay Area.

Kevin Langdon reports (2008):
I was active in fandom in the early-to-mid 1960s. There were a lot of young people in fandom then, especially in the San Francisco Bay Area, who were into "free love," and people spoke quite openly about their affairs. I decided to try to put together a graphical representation of all the sexual connections I knew about, with solid lines for male/female connections and dotted lines for
gay connections. My diagram got around and others began doing the same thing for the circles they knew.

Nobody seemed upset by the Chart; in fact, it became a source of entertainment, as some fans maintained they had been short-changed in their number of Chart connections.