To both points it extends beyond the reach of vision-- hundreds of miles beyond--forming, like a ribbon of silver, the selvage of the Mexican Sea.

It separates the turquoise blue of the water from the emerald green of the forest, contrasting with each by its dazzling whiteness.

Its surface is far from being level, as is usual with the ocean-strand.

On the contrary, its millions of sparkling atoms, rendered light by the burning sun of the tropic, have been lifted on the wings of the wind, and thrown into hills and ridges hundreds of feet in height, and trending in every direction like the wreaths of a great snow-drift.

I advance with difficulty over these naked ridges, where no vegetation finds nourishment in the inorganic heap.