reality, it is a rich creamy lime, but only where the red strata above have been degraded and washed away does the natural color of this wall appear.

The Plateau. Below the red-wall limestone, there are several strata of red and gray and olive rocks that slope to the plateau. This plateau is not quite so wide on the north side as on the south, owing to El Tovar being located in the recess of a great amphitheatre. It is from these plateaus that the finest views of the real Canyon can be obtained. The visitor, sitting on the porch or on the rim at El Tovar, cannot realize that below his feet, as it were, there is an almost exact duplication of the wall and slopes of talus, the thrilling precipices, the alcoves, recesses, promontories and the like, that he sees on the north side. And yet a trip down the trail on to the plateaus reveals these stupendous facts in a manner that is surprising even to those who, for years, have been familiar with them. How much more, then, is such an experience to a tyro. I have met men who were world-wide travelers, and who were visiting the Canyon for the first time; some of these were expert geologists, yet they refused to go down the trail, with the excuse that they could fully grasp the scenery from the rim. But that is impossible. The human mind cannot realize the effects of vastness and power this Canyon scenery produces, except when one stands below the cliffs and looks up. And where the opportunity is given of looking both up to towering walls, and down over beetling precipices, the effect is enhanced.