 Most of the information on Pyrrho's philosophy comes from his student Timon.Only fragments of what Timon wrote have been preserved, mostly by Sextus Empiricus, Diogenes Laertius, and Eusebius.Most biographical information on Pyrrho, as well as some information concerning his demeanor and behavior, come from the works of mid-third century BC biographer Antigonus of Carystus.