Anxious to see what Gostel really was up to, Ned had instructed the boys to remain at a hotel at Culebra or visit the Chester camp, just as they saw fit, and had followed Gostel back to Gamboa and out to the stone house, where he had managed to hide himself in the room above described without his presence on the premises being suspected. One thing, however, Ned did not know, and that was that Jimmie McGraw, full of life and curious to know what was going on, had trained on after him and was now watching the house from a thicket on the hillside.