Down the street came two girls in poke bonnets and hurried in at the open door. The figure drew back and was motionless as they passed, then with a swift furtive glance in either direction a head came cautiously out from the shadow and darted a look after the two lassies, watched till they were out of sight, and a form slid into the doorway, winding about the turning like a serpent, as if the way were well planned, and slipped out of sight in a dark corner under the stairway.

Half an hour or perhaps an hour passed, and one or two hurrying forms came in at the door and sped up the stairs from some errand of mercy; then the night watchman came and fastened the door and went away again, out somewhere through a back room.

The interloper was instantly on the alert, darting out of its hiding place, and slipping noiselessly up the stairs as quietly as the shadow it imitated; pausing to listen with anxious mien, stepping as a cloud might have stepped with no creak of stairway or sound of going at all.

Up, up, up and up again, it darted, till it came to the very top, pausing to look sharply at a gleam of light under a door of some student not yet asleep.

From under the dark cloak slid a hand with something in it. Silently it worked, swiftly, pouring a few drops here, a few drops there, of some colorless, odorless matter, smearing a spot on the stair railing, another across from it on the wall, a little on the floor beyond, a touch on the window seat at the end of the hall, some more on down the stairs.

On rubbered feet the fiend crept down; halting, listening, ever working rapidly, from floor to floor and back to the entrance way again. At last with a cautious glance around, a pause to rub a match skilfully over the woolen cloak, and to light a fuse in a hidden corner, he vanished out upon the street like the passing of a wraith, and was gone in the darkness.

Down in the dark corner the little spark brooded and smouldered. The watchman passed that way but it gave no sign. All was still in the great building, as the smouldering spark crept on and on over its little thread of existence to the climax.

But suddenly, it sprang to life! A flame leaped up like a great tongue licking its lips before the feast it was about to devour; and then it sprang as if it were human, to another spot not far away; and then to another, and on, and on up the stair rail, across to the wall, leaping, roaring, almost shouting as if in fiendish glee. It flew to the top of the house and down again in a leap and the whole building was enveloped in a sheet of flame!

Some one gave the cry of Fire! The night watchman darted to his box and sent in the alarm. Frightened girls in night attire crowded to their doors and gasping fell back for an instant in horror; then bravely obedient to their training dashed forth into the flame. Young men on other floors without a thought for themselves dropped into order automatically and worked like madmen to save everyone. The fire engines throbbed up almost immediately, but the building was doomed from the start and went like tinder. Only the fire drill in which they had constant almost daily practice saved those brave girls and boys from an awful death. Out upon the fire escapes in the bitter winter wind the girls crept down to safety, and one by one the young men followed. The young man who was fire sergeant counted his men and found them all present but one cadet. He darted back to find him, and that moment with a last roar of triumph the flames gave a final leap and the building collapsed, burying in a fiery grave two fine young heroes. Afterward they said the building had been “smeared” or it never could have gone in a breath as it did. The miracle was that no more lives were lost.

So that was how the burning of the Salvation Army Training School occurred.