reason to assume that it was any different from the underwater wall she had explored.
'It's hard to tell in the poor light, but from here that wall looks easier than some of the rock faces I've climbed in West Virginia. Too bad we don't have some crampons and a pickax.' She laughed. 'Heck, I'd even settle for a Swiss army knife.'
Chi stared thoughtfully into space for a moment.
'Maybe I have something better than a Swiss army knife.'
He reached under his shirt, slipped a leather thong over his head, and handed it to Gamay. In the dim light the pendant dangling from the cord looked vaguely like the head of a bird of prey
Gamay cradled the object in her palm. The green eyes sparkled even in the faint cavern light, and the white beak seemed to glow. 'Beautiful. What is it?'
An amulet. Kukulcan the storm god. He was the Mayan equivalent of the Aztec's Quetzalcoatl, the feathered serpent. The head is made of copper with jadite eyes, the beak of quartz. I carry it for good luck and to cut cigars.'
The round base fit her hand. She fingered the short blunt beak
'Tell me, Dr; Chi, how hard is limestone?'
'It's made of calcium carbonate and ancient seashells. Hard but crumbly as you would expect.'
'I was wondering if I could chip hand and footholds in that wall. Enough to get me within reach of those vines.' She wasn't sure what she would do once she escaped from the cave, but she'd think of something.
'It's possible. Quartz is almost as hard as diamond.'
'In that case I'd like to borrow this little birdsnake for a while.'
'Be my guest,' he said. 'The power of the gods may be necessary to free us from this dungeon.'
Gamay eased back into the water and swam across the pool, then along the wall to a slight bulge in the limestone. Holding on to the ledge with one hand, she reached up and found a hole big enough for her fingers. Using the amulet as a crude adze, she chipped away until the space was big enough to give her fingers a grip. Then she pulled herself up so her knee was balanced on the ledge and chipped another hole somewhat higher.
Once she was able to stand .to her full height the work went quicker. She inched up the face of the wail. Clinging to the sheer rock face with her face pressed against the hard surface gave her an intimate knowledge of the limestone's character. As she suspected, the wall was cracked and gouged. She used natural handholds or simply enlarged existing holes. Her hair was covered with powdery white dust. She had to stop occasionally to wipe her nose on her shoulder. One good sneeze would blast her into space.
How did Spiderman make it look so easy? She would have given anything for a couple of Spidey's webshooting wrist bands. Hanging on was tough in itself; what exhausted her the most was having to work with her arm extended over her head. Her shoulder ached, and often she had to let her numbed arm dangle until the blood came back into it. She wondered if she would ever work the kink out of her neck.
Halfway up the wall she looked down: The white smudge of Chi's shirt was barely visible in the gloom. He'd been watching her progress.
Are you all right, Dr. Gamay?' he said, his voice echoing.
She spit out a powdery gob. Unladylike but who cares. 'Piece of cake.'
Damn, she wished that yellow-fanged cretin hadn't stolen her wristwatch before stuffing them underground. She had lost track of time. The light coming into the cave was more slanted and dimmer than when she started. The sun must be setting. The tropical night fell with the swiftness of a guillotine blade. Soon the cave would be pitch black. Making a grab for the vines would be tough even with light to see them by In the darkness it would be impossible.
Dr. Chi must have sensed her doubts. Again his encouraging voice came from below, calmly telling her that she was doing fine, that she was almost there. And all at once she was there, where the ceiling curved into the domed roof. She swiveled her head slowly and saw she was level with the tips of the vines. She moved higher to give herself the margin of error she needed if her leap was to succeed. Now she was under the curving wall.
The strain was telling on her tired fingers. She had to move fast or not at all.
Another quick glance. The vines hung about six feet out from the wall
Think your moves through. But be fast! She mentally rehearsed. Spring off the wall, twist her body in midair; grab a vine, and hold on.
As she told the professor. Pieceacake.
Her fingers felt as if they were being torn from her hands. She angled her shoulder away from the wall.
No more time. Now.
She took a deep breath and leaped.
She spun around as her body described a parabola, her hands reaching hungrily for the vine. Brushed, then caught it. Dry and brittle. She could tell from the stiffness that it wasn't going to hold her weight. Snap! Grabbed with her free hand for the other vine. Felt it break.
And fell.
Still holding the useless pieces of vegetation, she hit the water. No time to move her feet or head around for a clean dive. She landed on her side with a sickening splat! When she broke the surface her left arm and thigh stung from the impact. She bit back the pain and. swam in an awkward sidestroke to the edge of the pool.
Chi's hand, surprisingly strong, took her by the wrist and helped her out of the water. She sat for a moment trying to rub die sting out of her thigh.
Are you all right'
'I'm fine,' she said between gasps. The fall had knocked the air out of her. 'Phooey, after all that work.' She handed the amulet back to Chi. 'Guess the gods had other plans for us.' .
'From what I saw they would have had to give you wings.'
'I would settle for a parachute.' She broke into laughter. 'I must have been quite the sight flying through the air holding on to these things.' She tossed aside the useless vine fragments clutched in her hand.
'I don't think Tarzan need fear any competition, Dr. Gamay'
'Nor do I. Tell me again about the passageway, the one with water in it.'
The professor took her hand. 'Come,' he said.
The chamber was almost totally in darkness, and Chi could have been leading her into the jaws of hell for all she knew. At one point he stopped, and a second later the flame from his butane lighter flared and threw grotesque shadows on the rough walls.
'Watch your head,' Chi cautioned, leading her into a passageway. 'The ceiling gets lower, but we don't have far to go.'
After a few minutes the tunnel eventually widened and gave Gamay more headroom. The passageway sloped down slightly, abruptly ending in a blank wall. Below the wall was a small pool.
'The tunnel dips below the water table here,' Chi explained. 'Whether it goes up or down after that, I don't know'
'But it's not impossible that this tunnel might lead to the surface.'
'Si. The ground of the Yucatan is simply a limestone . slab honey combed with natural caverns and tunnels carved out over the eons by water action.'
Gamay shivered, not so much from the cold and damp but at the claustrophobic prospect of swimming into the waterfilled earth. She willed her fears away, but some lingered.
'Professor Chi; I know this is a long shot. I'm going to see if this leads anywhere. I can hold my breath for about two minutes, which will give me time to swim a fair distance.'
'It is very dangerous.'
'Not any more so than waiting for those jokers up above to decide when they're going to wall us permanently into this place. After my dentally challenged friend has some fun, of course.'
Chi didn't argue. He knew she was right.
'Well,' she said, 'time for a dip.'
She slid into the pool and started a sequence of noisy hyperventilation exercises to fill her lungs with oxygen. When she had absorbed air to the point of dizziness, she ducked underwater and scoped out the tunnel opening. She rose to the surface and reported her find to Chi. 'It angles down, but I don't know how far it goes.'
He nodded. 'Make sure you allow enough air to return.' Chi leaned over and handed her his butane lighter. 'You may need this where you're going.'
