He turned left onto another colorless, musty corridor, this time lit reluctantly by oval lightbulbs in ancient fixtures that might once have been brass-colored but were now a gunky black.

As he walked, he made a note of the water dripping from the ceiling; better that the janitors fix leaks than wax floors. Before you knew it, mold would be clotting the walls and mushrooms sprouting from the most unexpected places.

He approached a length of corridor where so much mud had been tracked in by way of footprints that a detective (which, strictly speaking, he was not) would have assumed a scuffle had broken out among a large group of untidy, rather frenzied and determined, individuals. Perhaps it had; patients often did not like being labeled patients.

The mud smell thickened the air, but entwined around it, rooted within it, another smell called to him: a fragrance both fresh and unexpected. He stopped, frowned, and sniffed once, twice. He turned to his left and looked down. In the crack between the wall and the floor, amid a patch of what could only be dirt, a tiny rose blossomed, defiantly blood-red.

He bent over the flower. How rare. How lovely. He blinked, took a quick look down the corridor to his right and left. No one.

Deftly, he plucked the rose, avoiding the thorns on the stem. Straightening up, he stuck the flower through the second buttonhole of his jacket, patted his jacket back into place, and continued down the corridor.

Soon he came to a junction, with three corridors radiating out to left, right, and center. Without hesitation, he chose the left, which slanted downward. The air quickly became colder, mustier, and overlaid with the faint scent of … trout? (Were cats hoarding fish down here?) The light grew correspondingly dimmer. He had hoped to review the files on “X” before reaching Room 54, but found it an impossible task in the gloom. (Another note to the janitors? Perhaps not. They were an unruly lot, unaccustomed to reprimand, and they might make it difficult for him. No matter: the words of his colleagues still reverberated in his head: “X is trapped between the hemispheres of his own brain”; “X is a tough nut to crack”; “X will make an excellent thesis on guilt.”)

No matter. And although he appreciated the position of those who believed the building should be renovated to modern standards, he did enjoy the walk, for it created a sense of mystery, an atmosphere conducive to exploration and discovery. He had always thought that, in a sense, he shed irrelevant parts of himself on the long walk, that he became very much functional in his splendid efficiency.

He turned left, then right, always descending. He had the sensation of things flitting through the air, just on the verge of brushing his skin. A coppery taste suffused the air, as if he were licking doorknobs or bedposts. The bulbs became irregular, three burnt out for each buttery round glow. His shoes scraped against unlikely things in the darkness that lay beneath his feet.