WE DIDN'T get very far before running into our first obstacle. The huge door leading out of the cavern was bolted shut and wouldn't open. It was the type of door you find on walk-in safes in banks. There was a long row of combination locks running across the middle, beneath a circular handle.
"I wrestled with this for more than an hour," Vancha said, tapping the row of small lock windows. "Couldn't make head nor tail of it."
"Let me have a look," Mr Crepsley said, stepping forward. "I am not adept at locks such as these, but I have broken into safes before. I may be able to ?" He trailed off, studied the locks a minute, then cursed foully and kicked the door.
"Something wrong?" I asked lightly.
"We cannot go this way," he snapped. "It is too intricately coded. We must find a way around."
"Easier said than done," Vancha replied. "I've scoured the cavern for hidden passages and tunnels - didn't find any. This place has been purpose-built. I think this is the only way ahead."
"What about the ceiling?" I asked. "The vampaneze came that way the last time we were down here."
"There are removable panels in the roof of the cavern," Vancha said, "but the space above them is only accessible from down here, not through the tunnel."
"Couldn't we break through the wall - around the door?" Harkat asked.
"I tried," Vancha said, nodding at a hole he'd punched out a few metres to our left. "It's steel-lined.Thick steel. Even vampires have their limits."
"This doesn't make sense," I grumbled. "They knew we'd come. Theywant us to come. Why strand us here? There must be a way through." I knelt and examined the rows of tiny windows, each of which contained two numbers. "Explain this lock to me," I said to Mr Crepsley.
"It is a combination lock. Quite straightforward. The dials are down there." He pointed to a series of thin dials beneath the windows. "You twist them clockwise for a higher number, anti-clockwise for a lower number. When the correct numbers have been entered in all fifteen windows, the door will open."
"And each number's different?" I asked.
"I assume so." He sighed. "Fifteen different locks, fifteen different numbers. I could crack the code eventually, but it would take several nights and days."
"It doesn't make sense," I said again, staring at the meaningless numbers in the windows. "Steve helped design this trap. He wouldn't have built something we couldn't get past. There must be ?" I stopped. The last three windows were blank. I pointed them out to Mr Crepsley and asked why.
"They must not form part of the code," he said.
"So we've only twelve numbers to worry about?"
He smiled ruefully. "That should save us half a night or so."
"Why twelve?" I thought aloud, then closed my eyes and tried to think as Steve might (not a pleasant experience!). He'd exercised great patience in tricking us and setting us up for a fall, but now that we were close to the end, I couldn't picture him placing a boulder in our path which would take a week to remove. He'd be eager to get at us. The code he picked must be one we'd be able to crack pretty quickly, so it had to be simple, something which looked impossible, but in reality was as plain as ?
I groaned, then began counting. "Try these numbers as I call them out," I said to Mr Crepsley, eyes still closed. "Nineteen - Twenty - Five ?"
I carried on until I got to "Eighteen - Four." I stopped and opened my eyes. Mr Crepsley spun the last counter anti-clockwise to four. There was a click and the circular handle popped out. Startled, the vampire grabbed it and twisted. It turned easily at his touch and the round door swung open.
Mr Crepsley, Harkat and Vancha stared at me, awed.
"How ??" Vancha gasped.
"Oh, please!" Alice Burgess snorted. "Isn't it obvious? He just converted the alphabet into numbers, starting with one and finishing with twenty-six. It's the most simplistic code in operation. A child could work it out."
"Oh," Harkat said. "I get it now. A was 1, B was - 2, and so on."
"Right," I smiled. "Using that code, I dialled in 'Steve Leopard'. I knew it had to be something easy like that."
"Isn't education wonderful, Larten?" Vancha smirked. "We'll have to attend night classes when this is over."