One thing which troubled the boy not a little was the question as to whether the space into which he had brought his flying machine was sufficient in size for both the _Bertha_ and the _Louise_. They might be packed into the canyon, without doubt, but there was always the matter of room for the flight outward. Still, the place was ideal in that it appeared to be secure from observation from any position except the open sea. The mountain summits to the north and south seemed entirely inaccessible, while the crag to the east, under which the cave-like excavation showed, looked more like the sharp blade of an upturned knife at the top than a surface capable of being ascended. Ben waved his light back and forth, indicating to Jimmie and Carl that they should approach the canyon cautiously and from the east. He held an eye of flame to the summit of the crag to show that the drop must not come too suddenly in that direction. His idea, of course, was to bring the _Louise_ in so that her outward flight would be toward the sea. His own machine had come in from the west, and he knew that it would have to be lifted and wheeled about before she could be sent into the air. Besides offering a comparatively safe hiding-place for the machines, the canyon also seemed to offer protection from the weather for the boys. Ben did not fully investigate the excavations under the crag at that time, but he knew that the soft lime-rock had been washed away to a considerable extent, and that the face of the cliff was honeycombed with small caves. Jimmie circled about the canyon for a moment, caught sight of the crag under the flashlight, and passed its sharp edge with only a foot to spare. In a moment more, directed by the light in Ben’s hand, he drove the _Louise_ along the hard floor until she stood at rest by the side of the _Bertha_. Jimmie and Carl hastened to make themselves acquainted with the situation in the canyon by means of their electric searchlights. They ran here and there glancing up at the almost vertical walls to the north and south and throwing long fingers of light into the depressions in the crag. By this time Kit was asleep on the sand! “Looks like one of the East-Side apartment houses,” grinned Jimmie, flashing his light upward. “See, there’s a row of windows, and there’s something that looks like a fire-escape!” “Your row of windows,” laughed Ben, “consists of holes where lime-rocks have been worn away by the action of the water, and your fire-escape is only a long seam in the granite, with frequent cross sections.” “Aw, what’s the use of busting up illusions,” asked Jimmie. “I was having a pleasant dream of the East Side. And the East Side made me think of the little old restaurant on Fourteenth street, near Tammany Hall. And the thought of the restaurant reminded me that I hadn’t had anything to eat since noon. Why didn’t you let me dream?”