The nearest contempory historian to Jesus was Jospephus.
His work has a highly contraversial passage at least part of which is a pretty blatent later addition.
He says "around this time Jesus a wise man ....he was the Christ..."
Which might as well have been written in crayon - remember Josephus was Jewish not Christian.
But that doesn't necessarily mean it's all a later addition although it could be.
There's a wikipedia entry here:
http://en.wikipedia.org/wiki/Josephus_on_Jesus #Testimonium_Flavianum
But it's a highly contraversial topic and personally I', willing to trust Wikipedia on dull things but not when it gets emotive.
Look at the discussion tab for the entry and you'll see what I mean