How many Black Knights (Black Wings Generals) are there really?

Where in the Evan storyline does it say Freed hid the egg?
As has been pointed out, that would be quite a back-and-forth trip for someone who's dying.

After you save Afrien, he speaks of the past. You get teleported to the moment where the final battle was about to be fought. And Afrien speaks of what happened later. I believe it's the level 70 quest. But he does say it.