152 FOR THE FLAG Three minutes later it stopped, and I knew that we were rising to the surface. The noise at the hatch was again audible. It was opening this time. The door of my cabin yielded to me, and in a few bounds I was on the platform. T looked.... The tug had penetrated into the very interior of Back- cup. Here is the mysterious retreat where Count d’Artigas lives with his companions, outside—so to speak—of humanity !