I glanced up at my clamped left hand, back at the triflex downspire, down at the drop. I drew a long hard breath. Then, slowly, I worked my right hand along the cable until it was touching its locked-up mate.

Another breath and I hinged my body upward from the waist. Barely recovered nerve tissue in my stomach muscles sputtered protest. I hooked with my right foot, missed, flailed and hooked again. My ankle lodged over the cable. More weight came off my left arm. The pain began in earnest, racking explosions through the joints and down the muscles.

One more breath, one more glance d—

No, don’t fucking look down.

One more breath, teeth gritted.

Then I began, with thumb and forefinger, to unhinge my paralysed fingers one at a time from the cable.

I left the swooping bluish gloom of the eyrie’s interior half an hour later, still on the edge of a persistent manic giggle. The adrenalin humour stayed with me all the way along the cantilever arm, down the shaky archaeologue ladder—not easy with one arm barely functional—then the steps. I hit solid ground still smirking stupidly, and picked my way between the cabins with ingrained caution and tiny explosive snorts of hilarity. Even when I got back to the cabin we’d used, even inside and staring at the empty bed I’d left Sylvie in, I could feel the trace of the comedown grin twitching on and off my lips and the laughter still bubbled faintly in my stomach.

It had been a close thing.

Ungripping my fingers from the cable hadn’t been much fun, but compared with the rest of the escapade, it was a joy. Once released, my left arm dropped and hung at the end of a shoulder socket that ached like a bad tooth. It was as much use to me as a dead weight slung around my neck. A sustained minute of cursing before I could bring myself to then unsling my right foot, swing free by my right hand and use the momentum to make an ungainly leap sideways at the downspire. I grabbed, clawed, found that the Martians for once had built in a material that offered something approaching decent friction and clamped myself panting into the saddle at the bottom. I stayed like that for a good ten minutes, cheek pressed to the cold alloy.

Careful exploratory leaning and peering showed me the floor hatch Dig 301 had promised, within grasping distance if I stood up on the tip of the downspire. I flexed my left arm, got some response above the elbow and reckoned it might serve, if nothing else, as a wedge in the hatch. From that position, I could probably lever my legs up and inside.

Another ten minutes and I was sweatily ready to try.