User blog comment:Merlaa/Where did Merlin go?/@comment-107.10.244.141-20121226223813

I like to think that Merlin returned to Camelot to tell Gwen that Arthur was dead, then went back to Avalon immediately. I think he would hate to be away from Arthur's side - what if he returned while Merlin was gone? - but would go back to Camelot for perhaps a day to get things in order.

But also, the fact that Percival knew Morgana was on her way to kill Arthur means that perhaps he reached Merlin, but too late, after Arthur had been set sail to Avalon. Percival would have returned to Camelot to inform everyone of Arthur's death, which seems more likely than Merlin doing so.

And finally, I assumed that Merlin was immortal and lived all those years waiting for Arthur. I figured he would look like his young self if he had just been reincarnated as well....

This is all speculation, of course. We have no way of knowing the truth, now that it's all over... :(