A good storm-cloud full of lightning and rain on its way to its work on a sunny desert day is a glorious object.  Across the canon, opposite the hotel, is a little tributary of the Colorado called Bright Angel Creek.  A fountain-cloud still better deserves the name “Angel of the Desert Wells”—­clad in bright plumage, carrying cool shade and living water to countless animals and plants ready to perish, noble in form and gesture, seeming able for anything, pouring life-giving, wonder-working floods from its alabaster fountains, as if some sky-lake had broken.  To every gulch and gorge on its favorite ground is given a passionate torrent, roaring, replying to the rejoicing lightning—­stones, tons in weight, hurrying away as if frightened, showing something of the way Grand Canon work is done.  Most of the fertile summer clouds of the canon are of this sort, massive, swelling cumuli, growing rapidly, displaying delicious tones of purple and gray in the hollows of their sun-beaten bosses, showering favored areas of the heated landscape, and vanishing in an hour or two.  Some, busy and thoughtful-looking, glide with beautiful motion along the middle of the canon in flocks, turning aside here and there, lingering as if studying the needs of particular spots, exploring side-canons, peering into hollows like birds seeking nest-places, or hovering aloft on outspread wings.  They scan all the red wilderness, dispensing their blessings of cool shadows and rain where the need is the greatest, refreshing the rocks, their offspring as well as the vegetation, continuing their sculpture, deepening gorges and sharpening peaks.  Sometimes, blending all together, they weave a ceiling from rim to rim, perhaps opening a window here and there for sunshine to stream through, suddenly lighting some palace or temple and making it flare in the rain as if on fire.

Sometimes, as one sits gazing from a high, jutting promontory, the sky all clear, showing not the slightest wisp or penciling, a bright band of cumuli will appear suddenly, coming up the canon in single file, as if tracing a well-known trail, passing in review, each in turn darting its lances and dropping its shower, making a row of little vertical rivers in the air above the big brown one.  Others seem to grow from mere points, and fly high above the canon, yet following its course for a long time, noiseless, as if hunting, then suddenly darting lightning at unseen marks, and hurrying on.  Or they loiter here and there as if idle, like laborers out of work, waiting to be hired.

Half a dozen or more showers may oftentimes be seen falling at once, while far the greater part of the sky is in sunshine, and not a raindrop comes nigh one.  These thunder-showers from as many separate clouds, looking like wisps of long hair, may vary greatly in effects.  The pale, faint streaks are showers that fail to reach the ground, being evaporated on the way down through the dry, thirsty air, like streams in deserts.  Many, on the other hand,