One more stroke of the ax. The hole was larger now. As Red Mike stepped away, he pointed toward the hole. Pedro leered as he thrust the wire through the gap and hooked the bolt.

* * *

Then the unexpected happened. A hand came through the hole in the door and flung a tubelike object into the outer room. Before the astounded crooks realized what had happened, they were choking and coughing, gasping and covering their eyes.

A tear bomb had been projected from the inner room. It had taken Red Mike and his companions unaware. They were helpless — blinded — gasping as they tried to scream.

The two outer guards staggered into the street, pushing Spotter aside. Then the battered door swung open and a figure stepped into the outer room of the Black Ship. His rough clothes were gone; he no longer wore the khaki trousers and the coarse sweater. Instead, he was attired in a dark suit. Over his face he wore a gogglelike mask that completely obscured his features.

He walked unsteadily through the gas-filled room, pushing aside the choking men who staggered against him, stepping over those who lay helplessly weeping upon the floor.

He stumbled as he reached the door to the street, but he caught himself and came up the steps from the underground den. He gained the door ahead of those who were blindly seeking to find it.

Spotter slipped away and crouched by the wall of the building. The Shadow came out, pulled the mask from his face, and hurried down the alley.

"Stop him," screamed Spotter. "He's getting away!"

The two outer guards who had escaped after suffering from the first effects of the gas had now recovered. Their guns spoke as they fired after the speeding figure. It seemed to stagger. They ran after their quarry as he reached the street at the end of the alley.