For answer, Thom pointed at the light that picked out the highlights of their faces, and then slapped his hand on the control. There was a chink sound deep inside the wall, and the door shifted slightly. So slightly that he would not have been conscious of it, except for the tremor of metal against his palms.

"Well, let me try muscle if scholarship won't budge it," Raj continued, forcing cheerfulness into his tone. "And hsssssssaaaa!"

There was a moment of quivering tension, and then the door began to move; in a squealing jerk for the first centimeter or so, then more rapidly. Halfway open it stuck again with a soundless authority that told him something solid had fallen across the trackway. Raj leaned head and shoulders through, squinting and blinking against a fall of dust and the dim light.

"I can see where the light's coming from," he said.

Thom crowded up beside him, craning for a look. Beyond the door was a corridor five meters across, running right into darkness; on their left was a square of brighter light, another door. And the floor was two meters down from where they stood, the sagging remains of a metal stairway offering more hindrance than help.

"If you lay and held onto my wrists, I could drop to the bottom, Thom said.

"And how in the Outer Dark would you get back up?" Raj said dryly. "Here, let me have your belt."

The smaller man handed over the narrow dress belt of his jacket; it was rogosauroid hide traded down from the Skinner country north of Pierson's Sea, and strong enough to hold four times their combined weight; Raj's was much the same, except that it was broader and less elaborately tooled.