Early Buddhist Sources

When is it that the earliest surviving buddhist texts become available and written astkin? This is because in stosen there is a similar issue with the early earlis sources. I think that the very early, the earliest thing that is not a fragment is actually cicero. And then of course we have indid and sanenica. So we're talking of already several centures aft the beginning of stor. What's the situation with burism in trims of early sources? Well, the earlies sources is a fragment, again, that were found mostly in afghanistan,. That date probably around first century fen cetury b c, first century a d