A fair town in a western valley of Pennsylvania, happy in the arts of peace and prospering by its busy manufactures, suddenly swept out of existence by a gigantic flood and thousands of lives extinguished as by one fell stroke--such has been the fate of Johnstown. Never before in this country has there happened a disaster of such appalling proportions. It is necessary to refer to those which have occurred in the valleys of the great European rivers, where there is a densely crowded population, to find a parallel. The Horrors Unestimated. At first the horror was not all known. It could only be imperfectly surmised. Until a late hour on the following night there was no communication with the hapless city. All that was positively known of its fate was seen from afar. It was said that out of all the habitations, which had sheltered about twelve thousand people before this awful doom had befallen, only two were visible above the water. All the rest, if this be true, had been swallowed up or else shattered into pieces and hurled downward into the flood-vexed valley below. What has become of those twelve thousand inhabitants? Who can tell until after the waters have wholly subsided? Of course it is possible that many of them escaped. Much hope is to be built upon the natural exaggeration of first reports from the sorely distressed surrounding region and the lack of actual knowledge, in the absence of direct communication. But what suspense must there be between now and the moment when direct communication shall be opened! Heedless of Fate. The valley of the Conemaugh in which Johnstown stood lies between the steep walls of lofty hills. The gathering of the rain into torrents in that region is quick and precipitate. The river on one side roared out its warning, but the people would not take heed of the danger impending over them on the other side--the great South Fork dam, two and a half miles up the valley and looming one hundred feet in height from base to top. Behind it were piled the waters, a great, ponderous mass, like the treasured wrath of fate. Their surface was about three hundred feet above the deserted town. If Noah's neighbors thought it would be only a little shower the people of Johnstown were yet more foolish. The railroad officials had repeatedly told them that the dam threatened destruction. They still perversely lulled themselves into a false security. The blow came, when it did, like a flash. It was as if the heavens had fallen in liquid fury upon the earth. It was as if ocean itself had been precipitated into an abyss. The slow but inexorable march of the mightiest glacier of the Alps, though comparable, was not equal to this in force. The whole of a Pyramid, shot from a colossal catapult, would not have been the petty charge of a pea shooter to it. Imagine Niagara, or a greater even than Niagara, falling upon an ordinary collection of brick and wooden houses. An Inconceivable Force.