I moved along the short stretch of walk that led around the building to the rear. I could hear a stereo playing somewhere in one of the upstairs apartments. The small of my back ached and my cheeks felt as hot as if I'd just gotten back from a run, though whether it was from flu or fear I couldn't say. I moved quickly and silently along the rear walkway. Sharon's kitchen was the only one of the five that was dark. There was an outside bulb burning above each back door, casting a shallow but clear light onto each small patio. I tried the back door. Locked. I tapped on the glass.

"Sharon?" I strained for sounds inside the apartment. All was quiet. I scanned the rear entrance. If she had an extra set of keys outside, they would be hidden someplace close. I glanced back at the small panes of glass in her back door. If all else failed, I could always break one out. I slid my fingers along the top of the doorframe. Too narrow for keys. All the flowerpots seemed straight and a quick search revealed nothing tucked down in the dirt. There was no doormat. I lifted the pile of old newspapers, giving them a little riff, but no keys clattered out. The surrounding cinder-block patio wall was made of one-footsquare decorative "bricks," each design of sufficient intricacy to provide an ample, if not original, hiding place for a key. I hoped I wasn't going to have to check every single one. I glanced back at the small panes of glass, wondering if it might not be more to the point to pop one out with a padded fist. I looked down. There was a green plastic watering can and a trowel in one comer right up against the wall. I crouched, sliding my right hand into each of the decorative whorls of concrete. There was a key in one.

I reached up and gave the bulb above her back door a quick twist to the left. The patio was immersed in shadow. I fitted the key into the knob lock and opened the door a crack. "Sharon!" I whispered hoarsely. I was tempted to leave the apartment in darkness but I had to know if I was alone. I held the flashlight like a club, groping to my right until I found a switch. The recessed light above the sink went on. I saw the switch to the overhead kitchen light on the opposite wall. I crossed the room and flipped it on, ducking down and out of sight. I hunkered, holding my breath, my back against the refrigerator. I listened intently. Nothing. I hoped like hell I wasn't making a colossal fool of myself. For all I knew, the noise I'd heard was the popping of a champagne cork and Sharon was in the darkened bedroom performing illicit sexual acts with a little show dog and a whip.