"You’d think that after all these years they’d have found a mnemonic that would open your soul like a filing cabinet." He reached into a bedside table and pulled out a framed photograph. "Everything just in its place, everything organized, everything indexed and full of meaning. But that’s too much to ask of a human brain. Memories compact themselves, they blur. They turn to mulch, lose all color. The details go. Like a compost heap." He showed her the photo: a young woman in a high-collared coat, lipstick, eyeliner, wind-tousled brunette hair, squinting in sunlight, half smiling. Something guarded in her smile.