Liland,Thanks, an interesting site.
I especially enjoyed his reply to all the you-can't-prove-that's-true responses he got. Makes me wonder: why would people demand "contemporary documentation" to support a history of something that was, by necessity, secret? If your life depended upon there being no evidence of your religious activity, wouldn't you shy away from written records? I would...
If it's legend, it's one of the most plausible I've heard.
Sarah