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.
So sleepy and snuggly. What a good Christmas. It is much like other Narnian Christmases in that way.
Narnia has wedding customs, but they are between various creatures, and would not apply (for example, neither ruler is planning to give her affianced a heap of wood, as is customary among beavers). So they import some Earth things - Isabella's dress, though it is in full Narnian fashion all over leaves and flowers, is white. There is a cake, with some local chocolate (much nicer quality by now) adorning the frosting. There will be dancing while a small orchestra of creatures accompanies them with traditional Narnian songs and a little Bach Isabella pried out of the bookshelf.
There is an excitable rumor going about that Aslan will appear to marry them, but they can't really plan on that or even get an invitation to him (people who do get invitations: knights, Cair Paravel householders, important personages from the neighboring lands, holders of various honors from the war, other individuals who they like personally). So they plan on Mr. Tumnus conducting the ceremony, and they write themselves some vows, and the whole thing is held on the beach in high summer with the breeze blowing blessedly cool over them all from the sea.
Aslan does not appear to serve as celebrant, so Tumnus does it, and he does a perfectly lovely job, and the king and queen kiss one another.
It is a beautiful ceremony, and after that there is a delicious feast, and the dancing is fun, and then the King and Queen of Narnia are married and this is an excellent thing to be.
And now that they are married they can go on a Royal Progress and visit the towns and villages of Narnia and meet with their subjects and attend lots of parties and stay in their new summer palace.
All of which traveling is made more comfortable with Isabella's pocket house, although the summer palace is roomier and prettier than the pocket house and some creatures are so woeful at the prospect of the king and queen not staying in their home that the pocket house must occasionally be foregone.
The king is perfectly content to stay in the homes of various creatures, and also perfectly delighted by Isabella's pocket house. There is a lot to be delighted about. They are the King and Queen of Narnia, and they have a beautiful and prosperous kingdom, and they are married.
Eventually, though, they have visited every town and village and major landmark; they have stayed at the summer palace twice, and in Isabella's pocket house innumerable times; and they return to Cair Paravel to catch up with all the business that could not be conducted via knight-pin or scepter. James does a lot of paperwork at her writing desk. Routine rulership resumes.
Some creatures are putting together a music festival. It's a few hours' ride away; would the queen like to come and bring her harp? The queen would. She kisses her spouse goodbye - "Love you, Jamie!" - and gets on her horse and heads to the festival. There are piping satyrs, singing badgers, harpsichord-duetting peahens, a giant with a set of drums, dwarves with brass ensembles and centaurs forming string quartets. And Isabella on harp.
And then, partway through Isabella's performance, abruptly and without warning, the water around the little island freezes over.
She hears "Winter".
She reaches into her bag for cloak and bow.
This has predictable effects on the already panicking creatures.
She shoots him; she gets him in the shoulder.
She reaches for her scepter to bring it to her lips and speak to James.
He yanks the arrow out of his shoulder and keeps walking, unconcerned by the fountain of sparkling black blood that arcs out over the amphitheater and freezes everything it touches - grass, the ground, assorted instruments, unlucky creatures slow to flee. The flow abates after a few seconds, down to a mere gush from a pressurized spray, but in the meantime Isabella is splashed with burning-cold fluid. And Winter has nearly reached her.
Her cordial's in her bag. She bolts towards the slow creatures, reaching for it. Sprinkle, sprinkle, sip.
She needs her air walking shoes.
"FLY," she warns the creatures, "HELP EACH OTHER, DON'T TRUST THE BRIDGE IF YOU DON'T HAVE TO -" He set up an ambush, there could easily be something wrong with the bridge, but there's a lot of wings here.
Shoes or warning James -
"FIND KNIGHTS," she says, still running away from Winter and rummaging in her bag for her shoes. Here's one, here's the other -
And Winter's hand closes on the back of her cloak and he yanks her off her feet. He hasn't even drawn a blade, though he carries a sword at his side and multiple visible daggers in assorted places - he hauls her toward him, reaching for her scepter.
The scepter is the most important thing, after maybe only the cordial, without it she's cut off why didn't she have a pin of knighthood without it she can barely walk. She reaches for it too. "JAMIE -"
Winter is stronger, has better reach, has more experience in close-quarters scuffles - he wrestles the scepter away from her in mere moments and tosses it away into the picturesque bushes. His icy blood stings her hands. He picks her up and slings her over his uninjured shoulder.
She's holding her shoes, she's wearing her bag. She puts the shoes on her hands and claws at the air. It's solid, like that, but slippery.
His blood freezes the water's surface solid enough to walk on. He catches one of Isabella's hands, pulls the shoe from it, tosses the shoe out over the ice - it hits the edge of the wide frozen ring around the island. When he gets the other shoe, he throws it in the other direction, and it reaches open water and floats there.
If James is mobilizing forces - and she must be, if Isabella reached her with the scepter, if anyone has found a knight - she does not seem to be mobilizing them fast enough.
Isabella grabs her cordial and sprinkles it on his bleeding arrow wound.