As we walked back, the edges blended in the edges of the mesa across the canon.

The deep gorges, which had heretofore seemed the most prominent elements of the scenery, were lost.

We stood, apparently, in the middle of a wide and undulating plain, diversified by little ridges, and running with a free sweep to the very foot of the snowy Galiuros.

It seemed as though we should be able to ride horseback in almost any given direction.

Yet we knew that ten minutes' walk would take us to the brink of most stupendous chasms--so deep that the water flowing in them hardly seemed to move; so rugged that only with the greatest difficulty could a horseman make his way through the country at all; and yet so ancient that the bottoms supported forests, rich grasses, and rounded, gentle knolls.