There was a queer little choke in Millard's breathing as he went out of the room and returned with a bushel basket of shavings. These he dumped on the floor, close to a wall. Then, again, he went out. When he returned he was carrying a can of coal-oil. The contents he poured over the shavings, then against the wall. Next, over the shavings, he heaped three or four newspapers.

Jack Benson didn't ask questions. Millard went at it all in such a business-like way that the submarine boy felt the words sticking in his throat; they couldn't be uttered.

Finally, when all else was ready, Millard took the lighted candle out of the candlestick.

"This candle will burn for thirty minutes yet," guessed the wretch, noting its unburned length with the air of an expert "That will be time enough. Poor lad!"

He set the lighted candle down on top of the papers, over the pile of oil-soaked shavings. It fitted nicely into a place that the wretch had made ready for it. Then, without a word, the long-legged one tip-toed softly over and bent beside the submarine boy.

"Open your mouth," he ordered.

Of course Captain Jack didn't propose to do anything of the sort. With one hand, however, Millard gripped the boy's nostrils, pressing tightly. Just a little later Jack had to open his mouth for air.

"Thank you," mocked the other, and neatly shoved a handkerchief between the boy's jaws. This he tied in place, and rising, looked down upon a gagged foe. Then, with a last look over at the candle, the long-legged one darted from the room.

Left alone, Jack Benson watched that candle on top of the prepared heap. His eyes gleamed with the fascination of terror. When that candle burned down to the right point it would set fire to the paper, and then—!

Try as he would to bolster his grit, Captain Jack Benson found himself in a fearful plight. At first, he could only stare, with terror-dilated eyes, at that candle—ever burning just a slight fraction shorter!