"I don't know what happened, Tom," answered the housekeeper, "but I heard him fall, and ran upstairs, only to find him lying there, just like that. Then I called you. Hadn't you better have a doctor?"

"Yes; we'll need one at once. Send Eradicate. Tell him to run—not to wait for his mule—Boomerang is too slow. Oh, no! The telephone, of course! Why didn't I think of that at first? Please telephone for Dr. Gladby, Mrs. Baggert. Ask him to come as soon as possible, and then tell Garret Jackson to step here. I'll have him help me get father into bed."

The housekeeper hastened to the instrument, and was soon in communication with the physician, who promised to call at once. The engineer was summoned from another part of the house, and then Eradicate was aroused.

Mrs. Baggert had the colored man help her get some kettles of hot water in readiness for possible use by the doctor. Mr. Jackson aided Tom to lift Mr. Swift up on the bed, and they got off some of his clothes.

"I'll try to see if I can revive him with a little aromatic spirits of ammonia," decided Tom, as he noticed that his father was still unconscious. He hastened to prepare the strong spirits, while he was conscious of a feeling of fear and alarm, mingled with sadness.

Suppose his father should die? Tom could not bear to think of that. He would be left all alone, and how much he would miss the companionship and comradeship of his father none but himself knew.

"Oh! but I mustn't think he's going to die!" exclaimed the youth, as he mixed the medicine.

Mr. Swift feebly opened his eyes after Tom and Mr. Jackson had succeeded in forcing some of the ammonia between his lips.

"Where am I? What happened?" asked the aged inventor faintly.

"We don't know, exactly," spoke Tom softly. "You are ill, father. I've sent for the doctor. He'll fix you up. He'll be here soon."