“Blast it all!” Sir Grumdish snapped. “We should go back while we still can, before our air runs out. We can at least refill our air bottles in that cavern where we buried Snork.”

At this reminder of their fallen navigator, the crew grew silent. Sir Tanar shuffled nervously. Remembering Snork might inspire them to continue with their quest, just when they were on the verge of turning back. Days of suggestive comments to Conundrum had served well to demoralize most of the command crew.

“Oh, wow!” Razmous gasped, pressing his face to the porthole.

“What do you think, Navigator?” the commodore asked, still taking no notice of the kender. “Can you find us a way through or not?”

“I could,” Conundrum answered hesitantly, glancing at Sir Tanar. The wizard nodded. “Given enough time, and provided the maps are accurate, I could. But I am inclined to doubt it, considering that the Polywog apparently came to ruin following these same maps. So perhaps we should turn back.”

“And abandon your cousin’s Life Quest?” Commodore Brigg asked.

Conundrum swallowed the sudden lump in his throat, hung his head, and sighed, “Yes.”

“There’s a light outside the ship!” Razmous cried. “Maybe it’s the Polywog!

“What’s that?” Commodore Brigg exclaimed, pushing the excited kender aside and staring through the porthole. Outside the ship, there was indeed a number of shifting beams of reddish light shining through the murky water off the starboard bow. The other members of the crew, even Sir Tanar, crowded nearer for a look at the amazing sight. Here, unnumbered leagues beneath the Khalkist Mountains, there was another light, perhaps signifying another group of intrepid travelers, perhaps even, as Razmous had suggested, it was the ill-fated Polywog herself! It had become visible only because Sir Tanar’s spell had expired, casting the cavern into total darkness long enough for their eyes to adjust well enough to see the dim glow.

“Maybe it’s lava,” Sir Tanar offered without much conviction.

“Nay, we’d feel its heat. The water would be boiling,” the professor answered. “I should know. I’ve made extensive study of lava and other forms of heated rock.”

“Maybe it’s a dragon!” Sir Grumdish exclaimed.

“With hiccoughs,” Doctor Bothy added.

“Fellow scientists and engineers, I propose that the only way to find out is to observe and record,” the commodore said while stroking his curly white beard.

Sir Tanar ground his teeth in frustration.

“Chief Portlost, engage the flowpellars,” Commodore Brigg ordered. “Crew to your stations.”

The Indestructible lurched forward. While the commodore steered toward the light, Conundrum leaned close to Sir Grumdish and whispered, “You don’t think it’s really a dragon, do you?”

The usually sour-faced gnome grinned and shrugged.

They followed the light to its source through one of the passages that they had not yet tried, a narrow crack barely wide enough to allow the Indestructible to pass. But Commodore Brigg’s firm hand on the controls guided them safely between two vicious angles of rock that could have torn the ship in two. Soon, it opened out into a much larger chamber that was filled with similar light. The water here was a clear green, lit from above by a flickering red glow. Everywhere they looked, bubbles rose up in unceasing streams to a glimmering silvery surface, proving that the cavern was not entirely flooded. Glad for a chance at some fresh air-the interior of the ship had begun to ripen with the smells of gear oil, gnome sweat, and flashcooked beans-the commodore quickly ordered the ballast tanks blown and the ship surfaced.

A cloud of bubbles swarmed up around the ship as his orders were carried out, and the Indestructible slowly rose to the top. With their last glimpse before breaking the surface, Conundrum noticed several underwater passages leading off from this cavern. Quickly, he turned to his maps to note the exits, only to find that most of the maps had unaccountably disappeared. He grabbed the kender and began rifling through his pouches.

“Hey! You were walking all over them!” Razmous protested. “I didn’t want them to get damaged.”

The large, half-flooded chamber was lit by lurid flames dancing along the surface of the water. Sometimes the flames were like foxfire, thin shimmering veils floating dreamily along the surface. Sometimes they were bright roaring jets of blue-white fire that could have melted through the hull of the ship in seconds. But the danger of their situation was nothing compared to their wonder and amazement. Heedless of the fires leaping around them, Commodore Brigg steered the Indestructible toward a broken stalagmite protruding above the surface of the water near the center of the lake. The large stalagmite was a flat plateau large enough to put on a respectable circus-an island. A number of smaller stalagmites rising from the water around it promised a safe place to moor the ship.

At the center of the island lay a mound or heap, like an old mud hut thatched with golden straw. It was difficult to tell at this distance whether it was a construction or an accident of the light. The cavern itself stretched away into hazy darkness in either direction, a natural cathedral the dimensions of which could only be guessed at. With the ship fully surfaced, the hatches were opened and most of the crew members poured out onto the aft deck to marvel at their discovery. Commodore Brigg steered the ship nearer the island, guiding it between two stalagmites jutting like teeth from the flaming water. Crew members cast ropes over these and moored the ship fast, tying it off to the portside fore and aft recessed cleats. The island itself lay within easy reach of the Indestructible’s gangplank. Razmous was all for going immediately ashore, but most of the crew was more interested in the flaming waters that lay all about them.

Professor Hap-Troggensbottle was the first to put forth a theory. “If many such caverns exist, then the hot air trapped within them might provide sufficient buoyancy to make the islands and continents float,” he said.

“Imagine the engine such a cavern could drive!” Chief Portlost said, beginning his own conjectures. “Hot air rising up through chambers drilled in the roof above could drive fans to wind enormous springs. Those could then be used to power the moving stairs I have always wanted to build to replace the gnomeflinger system currently employed in Mount Nevermind for travel between levels.”

“Moving stairs?” Razmous asked. “I thought you were Maritime Sciences/'

Smiling, the chief removed his jacket and turned it inside out, revealing a gray tweed with the emblem of the Intramountain Transportation Guild sewn over the right breast pocket.

“But what about the island?” Sir Tanar groused, wiping his brow with the sleeve of his gray robe. The air in the cavern was sweltering, but the gleaming mound at its center had attracted his attention. “Isn’t someone going ashore to explore?”

“I’ll go!” Razmous offered.

The commodore eyed Sir Tanar suspiciously. “Very well,” he said. “Sir Tanar, since it was your idea, you may go ashore with Razmous, Conundrum, and Sir Grumdish. Report back immediately if you find anything. There may be creatures here that it would be wiser not to trifle with.”

“Shall I get my armor, then?” Sir Grumdish asked hopefully.

“There’s no time,” the commodore answered. “I’ve no intention of remaining surfaced longer than it takes to fill our air bottles. This cavern is too large. There may be unfriendly eyes watching us even now. Go quickly and return.”

Crestfallen, Sir Grumdish waited with the others while the gangplank was run out. He led the way ashore, followed by the kender and the Thorn Knight, with Conundrum bringing up the rear.