The October 1969 issue of Playboy, which featured a letter from one "Arnold K. Ravenhurst."
Here is an unexpected followup to yesterday's post: Crackpot historian, Hollywood actor and all-around MVP Adam Gorightly has a particularly amusing post up at Historia Discordia, "RAW Math vs. RAW Sex," about the time when Discordian Greg Hill responded to a condemnation of sex education in the public schools from the Christian Crusade with a warning about the dire consequences of math education. The upshot is that Robert Anton Wilson, writing as "Arnold K. Ravenhurst," planted Hill's warning in the Playboy forum.
Adam Gorightly got an assist with his post from Martin Wagner. More Martin Wagner news soon.