When the party has died down, Isabella, for one, is well and truly exhausted. She explores the palace until she finds a room with a bed in it, and into this bed she flops, still in her clothes and holding her staff and carrying the cordial in her pocket. She sleeps late, because the party kept her up so late and she hadn't really slept the night before; but around noon, she stirs, and gets up, and goes looking for James and wherever her backpack may have got to. The backpack she finds in the great hall where the principal mass of the party was; some enterprising creature took both bags from the battlefield at Beruna up to the castle for them, and she only wishes she knew who it was. She takes her bag to her room and carries James's with her and continues looking for her friend.
"I'm a Knight of the Order of the Lily - King James restored some old orders of knighthood," explains Starfall, showing off the pin where it's attached to one of her bags. "It lets me talk to her from anywhere as long as she's holding the - I don't think the object was ever properly named, but there's an object that can talk to all the pins."
"All right, I've found you on my magic map," James says after a moment. "And I can see the mountains on it too. How many winged horses are there in them?"
"It's definitely more winged horses than we've found anywhere else. Up until now, I wasn't sure there still were any."
"You should tell them that the White Witch has been defeated, her creatures have fled, Narnia is prospering again, and the king invites them to send an envoy to Cair Paravel to see it all in person and talk to people and learn things."