n the four
walls of his prison, and yet he had not wreaked the vengeance that was
in his heart. Twice he had been on the point of springing upon the
man, but both times the other's eyes had met his and something which he
was not able to comprehend had stayed him. Now that the other had gone
and he was alone contemplation of the hideous wrong that had been done
loosed again the flood gates of his pent rage.

The thought that he had been made by this man--made in the semblance of
a human being, yet denied by the manner of his creation a place among
the lowest of Nature's creatures--filled him with fury, but it was not
this thought that drove him to the verge of madness. It was the
knowledge, suggested by von Horn, that Virginia Maxon would look upon
him in horror, as a grotesque and loathsome monstrosity.

He had no standard and no experience whereby he might classify his
sentiments toward this wonderful creature. All he knew was that his
life would be complete could he be near her always--see her and speak
with her daily. He had thought of her almost constantly since those
short, delicious moments that he had held her in his arms. Again and
again he experienced in retrospection the exquisite thrill that had run
through every fiber of his being at the sight of her averted eyes and
flushed face. And the more he let his mind dwell upon the wonderful
happiness that was denied him because of his origin, the greater became
his wrath against his creator.

It was now quite dark without. The door leading to Professor Maxon's
campong, left unlatched earlier in the evening by von Horn for sinister
motives of his own, was still unbarred through a fatal coincidence of
forgetfulness on the part of the professor.

Number Thirteen approached this door. He laid his hand upon the knob.
A moment later he was moving noiselessly across the campong toward the
house in which Professor Maxon lay peacefully sleeping; while at the
south gate Bududreen and his six cutthroats crept cautiously within and
slunk in the dense shadows of the palisade toward the workshop where
lay the heavy chest of their desire. At the same instant Muda Saffir
with fifty of his head-hunting Dyaks emerged from the jungle east of
the camp, bent on discovering the whereabouts of the girl the Malay
sought and bearing her away to his savage court far within the jungle
fastness of his Bornean principality.

Number Thirteen reached the verandah of the house and