The realization came to be after the umpteenth time I read The Last Battle, and it struck me rather the way Digory struck the bell in Charn; the thought rang and rang, and the more it did so the more logical it seemed, especially in light of the lamb at the end of the world in The Voyage of the Dawn Treader. Tirian, of course, is a good sleeper, but I took the liberty of wedging a moment of intense thought between the moment he got into bed and the moment he went to sleep.
The Lamb Who Spoke the Truth
Where did you go, you precious?
What happened to you?
Did they hurt you?
When you spoke, oh! I felt your words touch us!
I lie here, dreaming in my bed
Of your innocence,
Of your courage,
And the truth that with valiant words you said.
Where did you come from, darling?
Did Aslan send you here?
Did he whisper his words to you?
Maybe I'll know in the morning…
Lamb, little Lamb, I know now.
I dreamt of you.
I saw you.
You were laid out as a Lion on Aslan's How.