“See how smoothly it goes, Brown!” cried the inventor. “And the rudder—how well it acts! We must register it tomorrow.”

His comrade’s face darkened and set. “It is registered,” he said, with a forced laugh.

“Registered?” said Pericord. “Registered?” He repeated the word first in a whisper, and then in a kind of scream. “Who has dared to register my invention?”

“I did it this morning. There is nothing to be excited about. It is all right.”

“You registered the motor! Under whose name?”

“Under my own,” said Brown, sullenly. “I consider that I have the best right to it.”

“And my name does not appear?”

“No, but—”

“You villain!” screamed Pericord. “You thief and villain! You would steal my work! You would filch my credit! I will have that patent back if I have to tear your throat out!” A sombre fire burned in his black eyes, and his hands writhed themselves together with passion. Brown was no coward, but he shrank back as the other advanced upon him.

“Keep your hands off!” he said, drawing a knife from his pocket. “I will defend myself if you attack me.”