But that was explained by the fact that the mysterious avenger was hard upon another trail.

The mysterious avenger had arrived close behind his quarry.

But there was no sign of the mysterious avenger who had ended the monster's vile career.

That mysterious avenger was the real threat; and his power seemed more substantial than ever before.

He would have been amazed to know that a mysterious avenger called The Shadow had stepped into the game.

The mysterious avenger of the dark was ready for the chase.

That being was The Shadow, mysterious avenger who dealt with men of evil.

He marveled at the power of this mysterious avenger who had brought needed rescue.

He had many proofs of the power of the mysterious avenger.

The Shadow, mysterious avenger, had brought shudders to the stoutest frames.