Mr. Damon opened the shop door, and was met by such an outward rush of choking gas that he staggered back.

“Bless my—­” he began but he had to stop, to cough and gasp.  “There must have been some sort of an accident,” he cried, as he got his lungs full of fresh air.  “A bad accident!  Tom could never work in that atmosphere.  Whew!”

“Accident!  What is matter?” cried Koku stepping to the doorway.  He, too choked and gasped, but his was such a strong and rugged nature, and his lungs held such a supply of air, that it took more than mere gas to knock him out.  He peered in through the wreaths of the acid vapor, and saw the body of his master, lying on the floor—­held down by the heavy iron.

In another instant Koku had rushed in, holding his breath, for, now that he was inside the place, the gas made even him feel weak.

“Come back!  Come back!” cried Mr. Damon.  ’You’ll be smothered!  Wait until the gas escapes!”

“Then Mr. Tom die!” cried the giant.  “I get him—­or I no come out.”

With one heave of his powerful right arm, Koku lifted the heavy shaft from Tom’s legs.  Then, gathering the lad up in his left arm, as if he were a baby, Koku staggered out into the fresh air, almost falling with his burden, as he neared Mr. Damon, for the giant was, well-nigh overcome.

“Bless my soul!” cried the odd man.  “Is he—­is he—­”

He did not finish the sentence, but, as Koku laid Tom down on the overcoat of Mr. Damon, which the latter quickly spread on the snow, the eccentric man put his hand over the heart of the young inventor.

“It beats!” he murmured.  “He’s alive, but very weak.  We must get a doctor at once.  I’ll do what I can.  There’s no time to spare.  Bless my—­”

But Mr. Damon concluded that there was no time for blessing anything, and so he stopped short.

“Carry him up to the house, Koku,” he said.  “I know where there are some medicines, and I’ll try to revive him while we’re waiting for the doctor Hurry!”

Tom was laid on a lounge, and, just then, Mrs. Baggert came in.

“Telephone for the doctor!” cried Mr. Damon to the housekeeper, who kept her nerve, and did not get excited.  “I’ll give Tom some ammonia, and other stimulants, and see if I can bring him around.  Koku, get me some cold water.”

The telephone was soon carrying the message to the doctor, who promised to come at once.  Koku, in spite of his size, was quick, and soon brought the water, into which Mr. Damon put some strong medicine, that he found in a closet.  Tom’s eyelids fluttered as the others forced some liquid between his lips.

“He’s coming around!” cried the eccentric man.  “I guess he’ll be all right, Koku.”

“Koku glad,” said the giant simply, for he loved Tom with a deep devotion.

“Yes, Koku, if it hadn’t been for you, though, I don’t believe that he would be alive.  That was powerful gas, and a few seconds more in there might have meant the end of Tom.  I didn’t see him lying on the floor, until after you rushed in.  Bless my thermometer!  It is very strange.”