It was getting harder to breathe, harder to think. But every time my thoughts began to drift, all I had to do was remember the vision the alien had shown me back at the morgue, and a cold rage would blow the cobwebs from my thoughts and let me think clearly again. I was here to bring the aliens blood and horror, and nothing was going to stop me.

Not even me.

An alien surged forward out of a side tunnel and stopped abruptly to block our way. A great pile of writhing snakes, of twisting tentacles, of thick threads that melted and merged into each other. I stopped and stood very still, looking steadily at the alien. Walker stood beside me. The alien showed no signs of moving or yelling for its security people. I tensed, half expecting the invisible scalpels, and then concentrated on how best to kill the thing. I was reluctant to summon up my full armour; the presence of so much strange matter within the mound might set off any number of alarms. I had my Colt Repeater, but even its many and varied bullets wouldn’t have much effect on a heap of seething tubes.

“Allow me,” said Walker, his words just a breath in my ear.

He took a firm hold on the handle of his umbrella, pulled and twisted, and drew from its hiding place a long slender steel blade. He strode purposefully forward and cut, hacked, and sliced the alien into a hundred pieces with cold, stern ferocity. The steel blade sliced keenly through the writhing tubes, severing and opening them up almost without resistance. The alien seemed more surprised than anything. It made no attempt to defend itself, just slid slowly backwards down the tunnel. Walker went after it, cutting it up with vicious precision, his arm rising and falling tirelessly. No blood flew on the air, just a thick clear ooze that dripped from the severed ends of twitching tentacle pieces as they writhed feebly on the floor of the tunnel. Soon enough the alien stopped moving, because there wasn’t enough left of it to hold together. Walker finished it off, hacking away until there wasn’t a length of alien tissue longer than a foot or two. Even at the end, there were no signs of any organs within the alien, just the endless pulsing tubes.

Walker stopped and lowered his sword. He stood over the last remnants of the alien and looked slowly about him at the scattered pieces. He was breathing harshly, as much from emotion as exertion. He straightened up, flicked a few drops of clear ooze from the tip of his sword, and then slid it neatly back into the spine of his umbrella.

“A sword?” I said finally. “Hidden inside an umbrella?”

“Don’t show your ignorance,” said Walker, his breathing already back to normal. “It’s an old tradition in the British spy game. Mention it to your Armourer; he’ll remember.”

“Why hasn’t the alien’s death set off any alarms?” I said, glaring about me into the painfully sharp light.

“Perhaps they weren’t expecting such a basic response,” said Walker. “There is such a thing as being oversophisticated.”

“And if more aliens do arrive?”

“Let them come,” said Walker. “I feel like killing some more aliens. I want to grind their bodies under my feet and dance in their blood.”

“Good,” I said. “I want that too.”

The centre of operations turned out to be a honeycomb of interlinked tunnels and caverns and what might have been other-dimensional spaces. There were openings and doorways that changed shape as you approached, tunnels that turned back on themselves if you didn’t concentrate on your destination strongly enough, and floating viewscreens that popped on and off, showing glimpses of distressingly inhuman other worlds. It was getting harder and harder to be sure of anything. Just being inside the alien mound distorted my thinking and filled my head with sudden thoughts and impulses that made no sense at all. I’d lost all track of time. My watch didn’t work. But I had to believe there was still time to stop the aliens, or this had all been for nothing.

I entered into a chamber like all the others and stopped dead in my tracks. Walker stopped beside me and swore softly. We weren’t the only people in the mound. The aliens had abducted men and women and even children from the town of Roswell and done things to them. For knowledge, or curiosity, or as a precursor to the experiment they were planning. Or maybe just because they could. For some alien purpose I could never hope to understand or forgive.

Some forty men, women, and children lay scattered across the sticky floor of the great open cavern. More protruded from the walls, half sunk and immersed in the slick wet surfaces. There were no cages, no bars, no force fields. These people had just been . . . worked on, and then dumped here to live or die. Many had died, their broken and distorted bodies unable to accept the terrible things that had been done to them.

Most had not been so lucky. They were still alive, aware, and suffering.

Their bodies had been vivisected: opened up and changed, made use of for surgical experiments. Not the brute mutilations I’d seen on the farmer in the morgue, or even in the future vision the alien had shown me. There was purpose to some of what had been done here, even if its end remained unknown. These people had been opened up, had their organs removed . . . and then put back again in different places, set up to work in different ways. Some organs had been replaced with alien substitutes, pulsing organic machines that wrapped themselves around kidneys and lungs and intestines.

I moved slowly forward into the chamber, like walking in a dream, a nightmare from which I wanted so badly to awaken. A man lay on his back, split open from crotch to throat, the sides pinned back with metal staples to reveal he’d been stuffed full of extra human organs. There were others like him, with several lungs, or half a dozen kidneys connected together, or miles of added intestines threaded in and out of his skin, the whole length of his torso. Others had been hollowed out, with nothing left inside them but threads of alien tissues performing unknowable alien functions.

The children were the worst. I couldn’t look at the children.

“Dear God,” said Walker. “What . . . What is this, Eddie? Are the aliens . . . playing with them?”

“I think . . . they’re trying to upgrade us,” I said. “According to their lights. Make us . . . better. More like them.”

“Is that what this is all about?” said Walker. “Forcibly . . . improving us?”

“All for our own good,” I said, and I didn’t recognise my own voice. “That’s what the alien said. Remember?”

“What are we going to do?” said Walker. He sounded lost. “What can we do? I mean, we can’t leave them like this . . .”

“No,” I said. “We can’t. That would be . . . inhuman.”

I armoured up and took on my battle form, covered with razor-sharp blades. And then I went among the suffering people and gave them the only comfort I could. I killed them. I killed them all. I raged back and forth across the great chamber, cutting throats, tearing out hearts, stamping on heads; killing men and women and children as swiftly and mercifully as I could. I cut off heads and stabbed alien organs, running them through and through till they stopped moving. I cut and hacked and stabbed, doing whatever it took to put a stop to this obscenity. It wasn’t easy; the aliens had made their improved people very hard to kill.

Some of them still had voices. I think some of them spoke to me, but I’ve never let myself remember what they said.

I went screaming and howling through the chamber, ripping bodies out of the walls and tearing them apart with brute strength, shouting obscenities and prayers, and blood sprayed across my armour and ran away in thick crimson rivulets. I killed them all, every last one, and when it was over, when I had dispensed the only mercy left to me, I armoured down and stood shaking and crying in the middle of the piled-up bodies. Drood field agents are trained to deal with horrors, to survive acts and decisions no one else could, but there are limits. There have to be limits, or we wouldn’t be human anymore.