I put a bucket on his head.

I do not kill non-hostiles.

He has a journal, which is blank, and I suppose that is funny if youre seven.

I just got back from there, he died like everyone else, but didn't he have a journal that was blank? Odd.

The way I see it, it's better just to kill him. I mean, sure he's blind but who takes care of him? Bandits. The very same bandits that you go and slaughter. After you leave something bad's bound to happen to him. Either killed by someone/something or left in that cave to rot.