Pelons are extremely rare "practice pieces" for the early t-shirt designs. Before production was initiated, the image or design was tested on cotton cloth or burlap to determine the color and line accuracy of the piece. Only a few of the "tests" were preserved once the design was deemed acceptable and the t-shirt went into production.
Randy Tuten's "market-the-performers" artwork was an easy read for music patrons when it was slipped into the series of David Singer-designed posters. The Doors were so popular by this time that Bill Graham eschewed his regular venues for the much larger Cow Palace just outside the city.