This tape is, in effect, a ready-made. Produced by the Pepsi Cola Company for its own use, it was accidentally substituted for one of my tapes in 1974. The mistake in the transfer was a communications mishap that involved a series of people and corporations... I wonder what accidents of this sort might reveal about secret channels of information. I see the material on this tape, innocuous as it may be, as a phenomenon that affects us without our being aware of its existence.