Snap and I decided to walk a portion of the way back to the ship. It was barely more than a mile through this subterranean corridor to where we could get the vertical lift direct to the landing stage.
We started off on the lower level. Once outside the insulation of Halsey’s office we did not dare talk of this thing. Not only electrical ears, but every possible eavesdropping device might be upon us. The corridor was two hundred feet or more below the ground level. At this hour of the night this business section was comparatively deserted. The through tube sounded over our heads with the passing of its occasional trains. The ventilators buzzed and whirred. At the cross intersections, the traffic directors dozed at their posts. It was hot and sticky down here, and gloomy with the daylight globes extinguished, and only the night lights to give a dim illumination. The stores and office arcades were all closed and deserted; only an occasional night-light burning behind their windows.
Our footfalls echoed on the metal grids as we hurried along.
“Nice evening,” said Snap awkwardly.
“Yes,” I said, “isn’t it?”
I felt oppressed. As though prying eyes and ears were here. We walked for a time in silence, each of us busy with memory of what had transpired in Halsey’s office.
Suddenly Snap gripped me. “What’s that?”
“Where?” I whispered.