In addition to the glyphs, note the letters "J. HIGGINS" defacing the lower right border of the rear text panel. This graffiti surprised the Victorian era explorer Alfred Maudslay, who documented all the graffiti he encountered during his explorations. His records are now stored and available in the British Museum.
"Only Stela A follows the tradition of earlier Copan monuments, which confine the figural image to the front surface of the stela, preserving the side and rear areas for panels of texts. "
Elizabeth Newsome, Trees of Paracise and Pillars of the World: The Serial Stela Cycle of "18-Rabbit-God K," King of Copan, p. 61