Black wind

limbs, she rubbed the file ferociously against the iron.
    Dirk, waiting patiently as Summer filed away, began whistling the old 1880s tune “While Strolling Through the Park One Day.”
    “That’s not helping,” Summer gasped, then smiled to herself at the silly tune. “Now I won’t be able to get that ridiculous song out of my head.”
    Sure enough, he quit whistling, but the tune kept replaying over and over in her head. She was surprised to find it became a good sawing mantra that provided a rhythm to her hand movements.
    While strolling through the park one day,… With each syllable, she applied a cutting stroke to the iron, creating an efficient sawing cadence. in the merry merry month of May.
    I was taken by surprise by a pair of roguish eyes.
    In a moment my poor heart was stole away.
    The water level had now crept up over her chin and she found herself taking in gasps of air, then submerging briefly to keep the file clawing in one spot. Dirk was beginning to strain to keep his face out of the water while applying alternating tugs and shoves on the ring as Summer sawed tirelessly on. A muffled metallic ting finally echoed beneath them as the ring broke loose under their combined pressure.
    “Three down, one to go,” Summer gasped, taking in a lungful of air after being submerged for several seconds.
    “Let me give you a breather,” Dirk said, grabbing the file from Summer with his free hand. The release of his right hand gave him a few extra inches of breathing room, but it was not enough to file the last mooring ring without submerging. Taking a deep breath, he ducked under the surface and began filing rapidly on the ring that held down his left wrist. After thirty seconds, he bobbed to the surface, sucked in some fresh air, and plunged back under. Summer stretched her cramped fingers, then swam to Dirk’s left side and waited for him to surface. Like a pair of tag team wrestlers trying to floor Hulk Hogan, they passed the file back and forth and ducked underwater, attacking the iron ring with muscle and fervor.
    As the minutes wore on, the water level in the cavern crept higher
    and higher. Each time Dirk surfaced for a gasp of air, he felt himself stretching farther and farther to raise his mouth and nose above water. The handcuff shackle on his left wrist dug into his flesh as he instinctively yanked hard to escape the clutch of the massive barge weight.
    “Save your strength for getting out of here,” he told his sister as the inevitable truth drew closer that they were running out of time. Summer said nothing as she grabbed the file out of his hand and plunged back beneath the surface. Dirk half-floated with his head tilted back, his face just barely out of the water, drawing a few deep breaths. He could feel the water wash over his face in ripples and stretched for one last deep breath before pulling himself under. Grasping Summer’s wrist, he pulled the file out of her hand and began a last furious rush at cutting through the iron. Feeling the gouge with his thumb, he could tell that they had cut only a third of the way through. There was just too far to go.
    The seconds felt like hours as Dirk made a final effort to break free. He could feel his heart beating like a bass drum as it struggled to pump oxygen into his depleted blood. In the murkiness, he could feel that Summer was no longer by his side. Perhaps she had finally taken his advice and sought escape. Or perhaps she just couldn’t bear to be with him during his final gasp of life.
    He paused from filing for a second to try pushing his weight against the ring. He could generate little leverage, however, and the iron ring held firm. Again, to the file he went, making furious strokes with the flimsy metal blade. His ears began pounding with each beat of his heart. How long had he been holding his breath now? A minute, two minutes? It was difficult to remember.
    Light-headedness fell over him as spots began to creep into his vision. He exhaled what remaining air was left in his lungs and fought the temptation to open his mouth and gulp in. His heart pounded stronger and it became a mental fight against succumbing to panic. A light current seemed to push him away from the mooring ring, but his hand muscle grasped the file tightly in a death grip. A white veil was being drawn across his vision and a distant voice inside was telling him to let go. As he fought a last battle with the voice, his ringing ears detected a deep thump and