Below the Pennsylvania Railroad Bridge at Johnstown, upon the south bank of the Conemaugh, was the large settlement of Cambria. It had a population of some five thousand people. At Cambria the mountain retreats for several hundred feet, leaving a level of two or three hundred acres in extent. Just below the bridge the Conemaugh River makes a wide curve around this level. About eight or nine hundred houses stood upon this level. Below Cambria stands Morrellville, a place about equal in size to Cambria. From this description of the location of Johnstown and neighboring settlements the course of the waters may be better understood when described. It was about ten minutes to three o'clock Friday afternoon when Mr. West, of the local office of the Pennsylvania Railroad at Johnstown, received a dispatch from the South Fork station, advising him to notify the inhabitants that the big dam in the South Fork, above the city, was about to break. He at once despatched couriers to various parts of the city, and a small section was notified of the impending danger. The messenger was answered with, "We will wait until we see the water." Others called "Chestnuts!" and not one in fifty of the people who received the warning gave heed to it. The Debris of Three Towns. With the waters standing several inches deep in the streets of the "flats" of the city the deluge from South Fork Lake, burst the dam and rushed full upon Johnstown shortly after five o'clock on Friday afternoon the last day of May. First it swept the houses from Mineral Point down into East Conemaugh. When the flood reached East Conemaugh the town was wiped out. This mass of debris was borne on to Johnstown, reinforced by the material of three towns. The Gautier steel department of the Cambria Iron Company was the first property attacked in the city proper. Huge rolls, furnaces and all the machinery in the great mills, costing $6,000,000, were swept away in a moment, and to-day there is not the slightest evidence that the mill ever stood there. Swept From the Roofs. Westward from this point the flood swept over the flats. The houses, as soon as the water reached them, were lifted from their foundation and hurled against their neighbors'. The people who at the first crash of their property managed to reach the roof or some other floating material were carried on until their frail support was driven against the next obstruction, when they went down in the crash together. The portion of the "flats" submerged is bounded by Clinton street to the Little Conemaugh River, to the point at Stony Creek, then back to Clinton street by way of Bedford. This region has an area of one mile square, shaped like a heart, and in this district there are not more than a dozen buildings that are not total wrecks.