Where the Culvert Ends

The drainage channel passed beneath the access road and kept going where Julian’s map showed a blank strip between two service tracks. He followed it on foot, leaving the gravimeter in its case on the roadside. The needle had held north since the gate. He wanted to know what it pointed toward before he gave it another chance to make the decision for him.

The culvert mouth stood behind a stand of reeds. Water moved through it toward him, shallow enough to leave the concrete floor exposed along both edges. Julian crouched and aimed his camera inside. The flash picked out a narrow run of concrete, then blackness. He checked the lens, took another frame without flash, and put the camera away.

The culvert was wide enough to enter on hands and knees. He tied one end of a cord to the grate outside and fed the coil ahead of him as he crawled. The concrete scraped his palms. Water soaked through one knee of his trousers, then stopped at a dry rise in the floor. Beyond it, the culvert bent left, a turn he could not see from outside.

At the bend, the water ran uphill.

Julian held a steel washer against the floor. It slid from his fingers and traveled against the trickle, toward the bend. It vanished around the corner. He waited, listening for it to clatter ahead. The sound came from somewhere beyond the concrete, a light tick that did not match the direction of the passage.

He backed out to the entrance and checked the cord. It remained taut. The line ran straight into the bend, though the passage itself turned. He marked the cord at the grate, took a separate note of its direction, and went back in.

The walls had changed beyond the turn. The concrete continued, but its rough finish gave way to a black surface cut with fine parallel lines. At regular intervals, cross-lines divided them into shallow rectangles. Julian measured the spaces with his fingers, then stopped himself from counting aloud. He had no clock, no coordinate sheet, and no reason to turn a local observation into a global one.

The culvert widened enough for him to kneel. Ahead, its floor ended at a low lip. Beyond the lip, a gridded surface stretched into darkness. The lines continued farther than his camera light reached. A thin break interrupted the nearest row, matching the gap visible in the photograph from the gate.

Julian took a photograph. He lowered the camera, waited for the flash to recharge, then took a second from a few inches to the left. The two frames disagreed about the width of the gap. The surface seemed to shift between them, though the camera and his position had moved only slightly.

He could turn back with the photographs and the cord. Claire’s instructions had not told him to come this far; she had made sure none of them knew enough to follow one another’s route. The thought of reaching the far side alone had been his own. So had the risk of arriving with no useful account beyond a picture of lines.