“I shall get my head turned, at this rate,” replied Tom, smiling dryly. “I’d better run at once.”

Grasping Ida Silsbee’s right hand, he thrust the tiller stick into it.

“Hold onto this. Don’t drop the stick, no matter what happens,” he directed. “Use it against ’gators—or snakes.”

Then, without loss of an instant’s time, he turned and sprinted desperately. A hundred feet is a short distance when one is traveling as though on air.

Seeing the boy coming, the alligator wheeled clumsily about. By this time, however, Tom Halstead’s hands rested against the bow of the boat. At the start of the run he had opened his sailor’s clasp knife. At one stout slash the boy cut the line holding the boat. Then he shoved off with his hands, and made a flying vault into the boat. Nor did he lose a second, as the boat drifted out from the shore, in starting the motor.

After the first moment’s hesitation the big ’gator started for the boat, as if scenting an enemy that might be vanquished. Seeing the high bow of the launch slip away, the ’gator kept on, lumberingly, toward Miss Silsbee.

Chug! chug! chug! sounded the motor’s exhaust, firing like pistol shots. The clumsy beast stopped an instant, as though wondering what new style of attack this could be on man’s part. Then, finding that no harm came, the big saurian reptile eyed Ida Silsbee’s fluttering skirts, and kept on lumbering toward her.

“Stay where you are!” called Tom Halstead, in a cool, low voice. It was typical of him that, the greater the danger, the more intense his coolness. His right hand on the wheel, the other ready to shift the motor control, he darted in to where Miss Silsbee stood bravely eyeing the oncoming alligator.

As the bow grated, Tom Halstead sprang up.