Athelstan knows he's being spoken to, he does hear, but not who's there beside him.
He lapses back into Northumbrian to say 'yes', and then, "Aedre? Modor?"
Other options:
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Athelstan knows he's being spoken to, he does hear, but not who's there beside him.
He lapses back into Northumbrian to say 'yes', and then, "Aedre? Modor?"