th her, urging and commanding
them all to see everything worth seeing.

"A human being would have absolutely no chance if ever caught in the
edge of that current," said Hodge. "The instant he was swept off his
feet he would be doomed."

"It's fascinating, fascinating!" exclaimed Inza. "I almost seem to feel
something pulling me toward the water."

"It's a very dangerous feeling," smiled Merry. "You know that an average
of sixteen suicides a year take place here at the falls. People cannot
resist the fascination of the rushing water. Many times no real reason
can be given for these acts of self-destruction. You know there are
moments when every human brain falters and seems touched by the fleeting
finger of insanity. People who stand on great heights often feel an
almost irresistible longing to fling themselves down. Here they are
attacked by a mad longing to cast themselves into the clutch of the
rapids."

"Oh!" exclaimed Elsie, pale to the lips. "Let me get away--farther
away!"

Inza offered assistance, but Elsie forced a laugh and declared she was
all right. However, she leaned on the arm of Bart, and they retreated
from the immediate edge of the rapids.

Frank watched them, unaware that Inza had stepped out on a stone that
lifted its damp crest in the edge of the water.

Suddenly he was startled by a cry.

He whirled, and saw something that sent his heart into his mouth.

Inza was lying across the rock, with both feet in the water.

A man in black, the cape of his long cloak flapping about his shoulders
like demon wings, was running from the spot, flourishing a stout,
crooked cane.

As he passed Frank, fully fifteen feet away, the fleeing man--whom Merry
knew as the same one who had so nearly accomplished Inza's destruction
on the Canadian shore--cast at the youth one piercing look.

The eyes of the man were black as blackest night, but in their recesses
gleamed a baleful fire of hatred and triumph.

The same eyes had glared at Merry through the transom of the Bowery
hotel, in New York.

They were the eyes of Alvarez Lazaro, the avenger!

But they were also the eyes of Porfias del Norte!

CHAPTER XXIX.

IN CONSTANT PERIL.

The frightful peril of Inza commanded Frank's whole attention. He leaped
toward her. He saw her slipping from the damp rock.

The eddying, swirling, hissing water was dragging at her feet. Inza's
gloved fingers clutched vainly at the rock. She could obtain no
detai