The height, at least, wasn't lost on Hallie and me. We turned out to be six feet on average-Hallie one inch over, and I, one under. In high school they used to call us forty percent of a basketball team. We didn't play sports, but they still said that. Height isn't something you can have and just let be, like nice teeth or naturally curly hair. People have this idea you have to put it to use, playing basketball, for example, or observing the weather up there. If you are a girl, they feel a particular need to point your height out to you, as if you might not have noticed.

In fact, Hallie and I weren't forty percent of anything-we were all there was. The image in the mirror that proves you are still here. We had exactly one sister apiece. We grew up knowing the simple arithmetic of scarcity: A sister is more precious than an eye.

"You tell that daddy of yours I need a pill to get rid of my wrinkles," Lydia said loudly.

I made an effort to collect myself. "Okay."

I should have said, "You don't need any such thing," or something like that, but I didn't think fast enough. I wasn't managing this first day all that well. I had a lump in my throat and longed to get back to my cottage and draw the blinds. Grace was a memory minefield; just going into the Baptist Grocery with Emelina had charged me with emotions and a hopelessness I couldn't name. I'd finished my shopping in a few minutes, and while I waited for Emelina to provision her troops for the week I stood looking helplessly at the cans of vegetables and soup that all carried some secret mission. The grocery shelves seemed to have been stocked for the people of Grace with the care of a family fallout shelter. I was an outsider to this nurturing. When the cashier asked, "Do you need anything else?" I almost cried. I wanted to say, "I need everything you have."

It was past midnight but a cold moon blazed in the window and I couldn't sleep. I lay on my back in the little painted bed in Emelina's cottage. I hated sleeping alone. As little as there was between Carlo and me, I'd adjusted to his breathing. All my life I'd shared a bed with somebody: first Hallie. Then in my first years at college I discovered an army of lovers who offered degrees of temporary insanity and short-term salvation. Then Carlo, who'd turned out to be more of the same. But companionable, still. Sleeping alone seemed unnatural to me, and pitiful, something done in hospitals or when you're contagious.

I'd finally reached that point of electric sleeplessness where I had to get up. I tucked my nightgown into my jeans and found my shoes out in the kitchen. I closed the door quietly and took a path that led away from the house, not down past other houses but straight out to the north, through Emelina's plum orchard and a grove of twisted, dead-looking apples. Every so often, peacocks called to each other across the valley. They had different cries: the shrill laugh, a guttural clucking-a whole animal language. Like roosters and children, on a full-moon night they would never settle down completely.

I wanted to find the road that led up the canyon to Doc Homer's. I wasn't ready to go there yet, but I had to make sure I knew the way. I couldn't ask Emelina for directions to my own childhood home; I didn't want her to know how badly dislocated I was. I'd always had trouble recalling certain specifics of childhood, but didn't realize until now that I couldn't even recognize them at point-blank range. The things I'd done with Hallie were clear, because we remembered so much for each other, I suppose, but why did I not know Mrs. Campbell in the grocery? Or Lydia Galvez, who rode our school bus and claimed to have loaned me her handkerchief after Simon Bolivar Jones chucked me on the head with his Etch-a-Sketch, on a dare. In fact, I felt like the victim of a head injury. I hoped that if I struck out now on faith I would feel my way to Doc Homer's, the way a water witcher closes her eyes and follows her dowsing rod to find a spring. But I didn't know. I could have lost the homing instinct completely.

I was on a road that looked promising, anyway. I could hear the river. (Why does sound travel farther at night?) I had my mother's death on my mind. One of my few plain childhood memories was of that day. I was not quite three, Hallie was newborn, and I'm told I couldn't possibly remember it because I wasn't there. The picture I have in my mind is nonetheless clear: two men in white pants handling the stretcher like a fragile, important package. The helicopter blade beating, sending out currents of air across the alfalfa field behind the hospital. This was up above the canyon, in the days when they grew crops up there. The flattened-down alfalfa plants showed their silvery undersides in patterns that looked like waves. The field became the ocean I'd seen in storybooks, here in the middle of the desert, like some miracle.