"Come back soon!" I say cheerily as the hidden door closes behind them.

I REMAIN, STARING into the sad eyes of the blue horse in the hanging. Snow gusts at the windows. I'm trying to remember what I was doing before everyone went away.

What just happened? Why can't I remember what just happened? Why do I feel so—

Numbers.

Mama says that when I'm confused or can't remember, I must do arithmetic, because numbers are an anchor. She's written out problems for me so that I have them at these moments. They're here next to the papers Father has been writing in his funny, loopy script.

46 into 1058.

I could work it out on paper in two seconds, but Mama always tells me to work it out in my head. "Clear your mind of everything but the numbers," she says. "Pretend you're alone with the numbers in an empty room." She's taught me shortcuts. For example, 46 is almost 50, and 1058 is only a little more than 1000. 50 goes into 1000 exactly 20 times. I start there and work with what's left. A minute later, I've figured out that 46 into 1058 is 23. I do another one. 75 into 2850 is 38. Another. 32 into 1600 is 50. Oh! These are good numbers Mama has chosen. They touch my memory and build a story, for fifty is Father's age and thirty-two is Mama's. They've been married for fourteen years and I am nine and a half. Mama was a Lienid princess. Father visited the island kingdom of Lienid and chose her when she was only eighteen. He brought her here and she's never been back. She misses home, her father, her brothers and sisters, her brother Ror the king. She talks sometimes of sending me there, where I will be safe, and I cover her mouth and wrap a hand in her scarves and pull myself against her because I will not leave her.