ering: "Oh, my God, save me!" and other words of
supplication that blended into an incoherent babel.

Jenks rushed to the man, trying to still his wild hysteria.

The building continued to sway dangerously.

* * * * *

Jenks looked from a window. An enormous crowd was collecting, watching
the big building swinging a foot out of plumb like a giant pendulum. The
crowd was growing. Should the building fall the loss of life would be
appalling. It was mid-morning. The interior of the building teemed with
thousands of workers, for all floors above the third were offices.

Teddy Jenks turned suddenly. He heard the watchman in the hall scream in
terror. Then he heard a body fall. He rushed to the door to see the Mad
Musician standing over the prostrate form of the detective, a devilish
grin on his distorted countenance.

The madman turned, saw Jenks, and started to run. Jenks took after him.
Up the staircase the madman rushed toward the roof. Teddy followed him
two floors and then rushed out to take the elevators. The building in
its mad swaying had made it impossible for the lifts to be operated.
Teddy realized this with a distraught gulp in his throat. He returned to
the stairway and took up the pursuit of the madman.

The corridors were beginning to fill with screaming men and wailing
girls. It was a sight never to be forgotten.

Laboriously Jenks climbed story after story without getting sight of the
madman. Finally he reached the roof. It was waving like swells on a lake
before a breeze. He caught sight of the Mad Musician standing on the
street wall, thirty stories from the street, a leer on his devilish
visage. He jumped for him.

The madman grasped him and lifted him up to the top of the wall as a cat
might have lifted a mouse. Both men were breathing heavily as a result
of their 15-story climb.

The madman tried to throw Teddy Jenks to the street below. Teddy clung
to him. The two battled desperately as the building swayed.

The dense crowd in the street had caught sight of the two men fighting
on the narrow coping, and the shout which rent the air reached the ears
of Jenks.

* * * * *

The mind of the engineer was still working clearly, but a wild fear
gripped his heart. His strength seemed to be leaving him. The madman
pushed him back, bending his spine with brute strength. Teddy was forced
to the narrow ledge that had given the two men foot