This was enough for Harry. He had felt that the tower demanded investigation. Now he was sure of it. The door that stood ajar was a temptation.
Opening his door, Harry stepped into the darkness of the hallway. He slipped silently along, until he found the door of the tower. It was still ajar.
Wearing soft slippers, Harry crept up the stairs. He moved with the utmost caution; the creaky stairs groaned very slightly.
The stairway was a winding one. As Harry turned a bend, he noted a faint light from the room above. The light was so insignificant that it could not be observable outside.
His steps becoming slower, Harry reached the top. There he could discern the objects in the room; for faint moonlight penetrated the apartment, through a skylight.
Each corner of the room accommodated a black machine. These metal contrivances, which seemed fitted to the wall, were hardly distinguishable.
But in the center of the room was an object which immediately attracted Harry’s attention, especially as it accounted for the dim light which he had just noticed.
Standing on a pedestal was a huge globe of bright metal, that reflected the moonbeams. The massive sphere had a highly polished surface, and it fascinated Harry’s eyes.
He stood looking at it in wonderment.
What could its purpose be?