be recognized as calendric information but the script as such remains undeciphered. Read in columns from top to bottom, its execution is somewhat cruder than that of the later Classic Maya and this has led epigraphers to believe that the script was also less phonetic than the largely syllabic Maya script. These are, however, speculations. The earliest known monument with Zapotec writing is a "Danzante" stone, officially known as Monument 3, found in San José Mogote, Oaxaca. It has a relief of what appears to be a dead and bloodied captive with two glyphic signs between his legs, probably representing his name. First dated to 500–600 BCE, this was earlier considered the earliest writing in Mesoamerica. However doubts have been expressed as to this dating and the monument may have been reused. The Zapotec script went out of use only in the late Classic period. Epi-Olmec or Isthmian script A small number of artifacts found in the Isthmus of Tehuantepec show examples of another early Mesoamerican writing system. They can be seen to contain calendric information but are otherwise undeciphered. The longest of these texts are on La Mojarra Stela 1 and the Tuxtla Statuette. The writing system used is very close to the Maya script, using affixal glyphs and Long Count dates, but is read only in one column at a time as is the Zapotec script. It has been suggested that this Isthmian or Epi-Olmec script is the direct predecessor of the Maya script, thus giving the Maya script a non-Maya origin. Another artifact with Epi-Olmec script is the Chiapa de Corzo stela which is the oldest monument of the Americas inscribed with its own date: the Long Count on the stela dates it to 36 BCE. In a 1997 paper, John Justeson and Terrence Kaufman put forward a decipherment of Epi-Olmec. The following year, however, their interpretation was disputed by Stephen Houston and Michael D. Coe, who unsuccessfully applied Justeson and Kaufman's decipherment system against epi-Olmec script from the back of a hitherto unknown mask. The matter remains under dispute. Abaj Takalik and Kaminaljuyú scripts In the highland Maya archaeological sites of Abaj Takalik and Kaminaljuyú writing has been found dating to Izapa culture. It is likely that in this area in late Pre-Classic times an ancient form of a Mixe–Zoquean language was spoken, and the inscriptions found here may be in such a language rather than