Some were white of face, some sooty, but all bore an expression of the most extreme anxiety.

The mine superintendent, who was also the owner, the mine boss, and the mining engineer were among the first at the shaft. The doctor and hospital attendant—whom the law requires to be maintained at all mines employing more than a hundred men—arrived but a few seconds later.

The superintendent, a vigorous Australian, who had taken part in many a sensational mining rush in his youth, and who had inherited the ownership of this coal mine from a distant relative but a few years before, leaped into action. Orders came rattling like hail.

All haulage of coal from below was stopped. The engine on the second shaft was thrown into gear, and the cages in both shafts were sent down to bring up the men.

Would there be any to bring?

What did the crash denote? A mere fall of roof, which might cause the loss of a few lives, or a vast explosion which would sweep every man below ground to death in a few seconds?

The cages had hardly reached the bottom when there came the second crash.

The crowd around the shaft was thickening. The doors of the hundreds of cottages clustered in rows about the colliery had been thrown open; from every direction the women came running, their shawls streaming behind them. Many of them had already lost fathers or husbands or sons below ground; all knew the awful menace of that sickening rumble.

With all the speed that the winding-engines could be made to give, the cages were hauled up. They had not yet reached the top when a sudden cry of horror arose. Otto, who had not gone home, despite his abandonment of the day's work, but who had hung around the pit-head all day, pointed with his finger to the steep hillside that rose abruptly above the mine.

The hill itself was falling!