A despatch from Greensburg says the day express, which left Pittsburgh at eight o'clock on Friday morning was lying at Johnstown in the evening at the time the awful rush of waters came down the mountains. We have been informed by one who was there that the coach next to the baggage car was struck by the raging flood, and with its human freight cut loose from the rest of the train and carried down the stream. All on board, it is feared, perished. Of the passengers who were left on the track, fifteen or more who endeavored to flee to the mountains were caught, it is thought, by the flood, and likewise carried to destruction. Samuel Bell, of Latrobe, was conductor on the train, and he describes the scene as the most appalling and heartrending he ever witnessed. A special despatch from Latrobe says:--"The special train which left the Union Station, Pittsburgh, at half-past one arrived at Nineveh Station, nine miles from Johnstown, last evening at five o'clock. The train was composed of four coaches and locomotive, and carried, at the lowest calculation, over nine hundred persons, including the members of the press. The passengers were packed in like sardines and many were compelled to hang out upon the platform. A large proportion of the passengers were curiosity seekers, while there was a large sprinkling of suspicious looking characters, who had every appearance of being crooks and wreckers, such as visit all like disasters for the sole purpose of plundering and committing kindred depredations." When the train reached Nineveh the report spread through it that a number of bodies had been fished out of the water and were awaiting identification at a neighboring planing mill. I stopped off to investigate the rumor, while the balance of the party journeyed on toward Sang Hollow, the nearest approach to Johnstown by rail. I visited Mumaker's planing mills and found that the report was true. [Illustration: TAKING DEAD BODIES FROM A ROOF.] All day long the rescuers had been at work, and at this writing (six o'clock) they have taken out seventy-eight dead bodies, the majority of whom are women and children. The bodies are horribly mutilated and covered with mud and blood. Fifteen of them are those of men. Their terribly mutilated condition makes identification for the present almost impossible. One of the bodies found was that of a woman, apparently about thirty-five years of age. Every conveyance that could be used has been pressed into service. Latrobe is all agog with excitement over the great disaster. Almost every train takes out a load of roughs and thugs who are bent on mischief. They resemble the mob that came to Pittsburgh during the riots. Measures of Relief. Pittsburgh is in a wild state of excitement. A large mass meeting was held yesterday afternoon and in a short space of time $1,000 was subscribed for the sufferers.