We know from Josephus (Antiquities 18.5.2) that John the Baptist certainly existed, at the time of Jesus, and baptized people in the Jordan.
Josephus says that he didn't baptize for the remission of sins, but only for its symbolic significance, I think I read somewhere that was against what the Gospels said, but I don't think the Gospels anywhere implied he was the one forgiving sins "be baptized for the remission of sins" could very well be symbolically speaking for expressing one's devotion.
There were disputes that supposedly Josephus placed John the Baptist's death at the time of Herod's war with the Nabateans in 36, whereas the Gospels place his death no later than 28/30 (depending on when you think Jesus was crucified, 30 or 33), but all Josephus says is that Herod's loss was attributed by the Jews to his beheading of John the Baptist, which doesn't have to be in the same year Herod lost the battle; 6 years is a short enough time for someone's curse to catch up.
Last edited by Cornelius; 07/16/10 06:35 AM.