HE CROSSED ABOVE THE OPENING where the stream came tumbling out of the mountain. The noise was deafening, especially for supersensitive vampire ears, so we hurried on as quickly as possible. The rocks were slippery, and in some spots we had to form a chain. At one extra-icy patch, Gavner and me both slipped. I was in front, holding on to Mr. Crepsley, but the force of the fall broke our grip. Luckily, Harkat held on to Gavner and pulled the two of us up.
We reached the mouth of a tunnel a quarter of an hour later. We hadn't climbed very far up the mountain, but it was a steep drop when I looked down. I was glad we weren't climbing any higher.
Mr. Crepsley entered first. I went in after him. It was dark inside the tunnel. I was going to ask Mr. Crepsley if we should stop to set torches, but I realized that the farther in we crept, the brighter the tunnel became.
"Where's the light coming from?" I asked.
"Luminous lichen," Mr. Crepsley replied.
"Is that a tongue twister or an answer?" I grumbled.
"It's a form of fungus that gives off light," Gavner explained. "It grows in certain caves and on the floors of some oceans."
"Oh, right. Does it grow all over the mountain?"
"Not everywhere. We use torches where it doesn't." Ahead of us, Mr. Crepsley stopped and cursed. "What's wrong?" Gavner asked.
"Cave-in," he sighed. "There is no way through."
"Does that mean we can't get in?" I asked, alarmed at the thought of having trekked all this way for nothing, only to have to turn back at the very end.
"There are other ways," Gavner said, "The mountain's riddled with tunnels. We'll just have to backtrack and find another."
"We had better hurry," Mr. Crepsley said. "Dawn is fast approaching."
We shuffled back the way we'd come, Harkat in the lead this time. Outside, we moved as quickly as we could - which wasn't very fast, given the treacherous footing - and made it to the mouth of the next tunnel a few minutes after the sun had started to rise. This new tunnel wasn't as large as the other and the two full vampires had to walk bent double. Harkat and me just had to duck our heads. The luminous lichen didn't grow strongly here, though there was enough of it for our extra-sharp eyes to see by.
After a while I noticed that we were sloping downward instead of up. I asked Gavner about this. "It's just the way the tunnel goes," he said. "It'll lead upward eventually."
About half an hour later, we cut up. At one stage the tunnel veered upward almost vertically and we faced a difficult climb. The walls pressed tightly around us, and I'm sure I wasn't the only one whose mouth dried up with nerves. A little after the tunnel leveled out, it opened onto a small cave, where we stopped to rest. I could hear the stream we had crossed earlier churning along not far underneath our feet.
There were four tunnels leading out of the cave. I asked Gavner how Mr. Crepsley knew which one to take. "The correct tunnel's marked," he said, leading me over to them and pointing to a tiny arrow that had been scratched into the wall at the bottom of one tunnel.
"Where do the others lead?" I asked.
"Dead ends, other tunnels, or up to the Halls."
The Halls were what they called the parts of the mountain where the vampires lived. "Many of the tunnels haven't been explored and there are no maps. Never wander off by yourself," he warned. "You could get lost very easily."
While the others were resting, I checked on Madam Octa, to see if she was hungry. She'd slept through most of the journey - she didn't like the cold - but woke every once in a while to eat. As I was taking the cloth off her cage, I saw a spider creeping toward us. It wasn't as large as Madam Octa, but it looked dangerous.
"Gavner!" I called, stepping away from the cage.
"What's wrong?"
"A spider."
"Oh." He grinned. "Don't worry - the mountain's full of them."