recovered my breath was of the extraordinary view over the country which we had traversed. The whole Brazilian plain seemed to lie beneath us, extending away and away until it ended in dim blue mists upon the farthest sky-line. In the foreground was the long slope, strewn with rocks and dotted with tree-ferns; farther off in the middle distance, looking over the saddle-back hill, I could just see the yellow and green mass of bamboos through which we had passed; and then, gradually, the vegetation increased until it formed the huge forest which extended as far as the eyes could reach, and for a good two thousand miles beyond.
I was still drinking in this wonderful panorama when the heavy hand of the Professor fell upon my shoulder.
"This way, my young friend," said he; "vestigia nulla retrorsum. Never look rearwards, but always to our glorious goal."
The level of the plateau, when I turned, was exactly that on which we stood, and the green bank of bushes, with occasional trees, was so near that it was difficult to realize how inaccessible it remained. At a rough guess the gulf was forty feet across, but, so far as I could see, it might as well have been forty miles. I placed one arm round the trunk of the tree and leaned over the abyss. Far down were the small dark figures of our servants, looking up at us. The wall was absolutely precipitous, as was that which faced me.
