Corroborating historical writings other then the Bible,huh? When I was just a lad, and young but grown man, I would have to have said sadly that, "I know of none, but maybe someday I will known of some' or something like that, to you.
Well, the years have certainly past, and my days in theology school are long past as well, and now I can answer your question with an 'affirmative' yes!!! And here are just a few examples for you to consider:
I think I know where you're coming from here as well. If one can't find even the slightest outside the Bible confirmation of Jesus' existence and proof of His miracles, then one might as well conclude that the authors of the Bible made up the accounts because they were biased toward Christianity", and, "If the miracles happened, why aren't they recorded outside of the Bible?" Am I on the right track with you here?
But be of good cheer my friend, for indeed some miracles of the Bible are recorded outside of Scripture, and by people who were not favorable to Christianity!!!
Thallus, was a writer who lived around AD 52, and he wrote to speculate on natural reasons that would explain away the three hours of darkness that occurred during Christ's crucifixion. Although the event corresponded with the monthly period of a full moon (which is sufficient to prove that the darkness could not have been a lunar eclipse), the most important point is that Thallus deals with Christ's crucifixion and the accompanying darkness as factual events. These were events for which he desired alternative explanations. A writer named Phlegon, circa AD 140, wrote similarly in one of his books entitled Olympiads.
Now the reason I give you the examples here of Thallus and Phlegon is that if Christ's crucifixion and accompanying darkness were only myths, ancient critics would not have sought alternative explanations to deny the miraculous aspects of the events - they would be denying the events altogether!!! Do you SEE the verification of Christ's existence and proof of His miracles and the miracles that surrounded His crucifixion here?!
But let me go on with other corroborating testimonies from outside the Bible sources. In the writings of Flavius Josephus also corroborates the Bible in a number of places. He was a Jew who turned his loyalty away from Jerusalem to the empire of Rome. Between AD 66-93, he wrote extensively of Jewish history. His works include detailed mentions of King Herod, "John, surnamed the Baptist" , and "James, the brother of Jesus who was called the Christ".
Josephus indicates some acknowledgment of miracles or miraculous claims in a passage known as the 'Testimonium Flavianum'. Because it so thoroughly supports the existence and reputation of Christ, some allege that early Christians must have altered the Greek text of Josephus' words!!Granting that possibility, here is a translation of the same passage from an Arabic text.
This would have been far less likely to circulate in Christian circles of that time, and it is admittedly less complimentary(unfavorable to the Christians of that time) than other translations:
'At this time there was a wise man who was called Jesus. And his conduct was good, and [he] was known to be virtuous. And many people from among the Jews and the other nations became his disciples. Pilate condemned him to be crucified and to die. And those who had become his disciples did not abandon his discipleship. They reported that he had appeared to them three days after his crucifixion and that he was alive;.. '
Another example I'll give to you is from the rabbinical writing, perhaps as early as AD 70, which states that one called Yeshu (Jesus), "practiced sorcery and enticed and led Israel astray." This is further indication that many outside of Jesus' circle of followers(the 12 Apostles) have associated irregular events with his person.
Please sincerely notice that even in the Islamic Qur'an it mentions Christ's virgin birth (Mary 19:15-22), his healing of the blind and lepers, and his raising of the dead (Table 5:110-112).6
Finally, just one last, but very interesting PROOF of Christ and His miracles, from an unusual, derogatory remark made by Julian the Apostate, Emperor of Rome and great foe of Christianity, where the (god-man) describes Jesus as one
having done nothing in his lifetime worthy of fame, unless anyone thinks it a very great work to heal lame, and blind people and exorcise demoniacs in the villages of Bethsaida and Bethany!!!
God bless you,