He froze.
The sound was not loud. It could have been mistaken for an old pipe shifting in cold weather if Eli had not been close enough to feel a faint vibration through the wood. He waited. The pattern came again, slightly irregular, accompanied by a soft metallic rattle. It seemed to originate beneath the concrete footing, where there ought to have been nothing but packed earth and the original foundation.
Eli had spent enough afternoons with Jonah to know that buildings made noise. Pipes expanded. Timber settled. Pumps cycled when nobody was standing near them. But those familiar explanations all depended on the presence of something that ought to be there. This sound came from a space Eli had never seen on any of the publicly available building sketches he collected from the county library.
The safest choice would have been to take Rascal and leave. He knew that as clearly as he knew his mother's phone number. He pictured the warm kitchen at home, the casserole waiting in the oven, and the little square of yellow light over the stove. Then the tapping began again, and his curiosity, the habit Jonah had nurtured for years, refused to let the unanswered question settle.
He took the small flashlight from his keyring and aimed it beneath the platform.
The beam found a strip of concrete, an old steel frame, and a recessed metal panel whose outline was almost invisible beneath dust and decades of grime. The panel looked older than the deck above it, but the narrow conduit running along one side did not. Its outer covering was clean and intact, and the fasteners holding it in place looked much newer than anything around them. Fresh marks scarred the underside of two boards, as though someone had recently lifted them and then put them back.
"Somebody's been working down there," Eli whispered.
Rascal pressed closer to his leg. The dog did not know what the sentence meant. He only knew his boy had stopped trying to leave, which was enough to make him increasingly unhappy.
Eli moved along the platform until he found a section of decking that sat a little higher than the rest. It was not a hidden door in the romantic sense, with a ring handle and ancient hinges. It was a maintenance hatch someone had concealed beneath boards the same color as the surrounding wood. The recent marks told him it had been opened more than once. One corner had not been seated correctly, leaving just enough room for him to see a narrow metal stairway beyond it.
He stared at that opening for a long time.
Whatever lay underneath the clubhouse was not a forgotten crawl space. It had lights, or at least a system meant to power them. It had recently installed equipment. It had a door built into the original structure and an access route hidden from the people gathering above. And somebody had been down there recently enough to leave marks that the rain had not yet washed away.
At the far end of the property, an engine started. Then another.