“Katharine! Go, I say!” The white of Alexander’s eyes was bloodshot.

But Katharine tried to drag John back from him as he advanced.

“Go! Leave the room!” cried Alexander, roughly.

With a quick movement he seized her arm, almost where he had grasped it on the previous day, and he tried to pull her away from Ralston. His strong hand hurt her. At the same time Ralston, not seeing how tightly Alexander held her, tried to disengage himself from her, as gently as he could. The struggle was not apparently violent, yet Katharine was exerting all her strength to cling to Ralston.

The floor, under the Persian rug, was highly polished. As Katharine stood, overbalanced in her strained position, the carpet slipped under her feet. With a short, half-suppressed cry, more of surprise than of fear, she relaxed her hands, fell sideways, and swung downward, her arm still in her father’s iron grip. To tell the truth, he was trying to hold her up, though in reality he had thrown her down. Suddenly she uttered a piercing scream, and turned livid, as she fell upon the floor, and her father let go her arm.

At the same instant John Ralston struck Alexander Lauderdale a violent blow on the mouth, which sent the taller man staggering back two paces. It all happened in an instant. Alexander sprang forward again instinctively, and struck at John, who dodged the blow and closed with him. They were better matched at wrestling than with fists, for Ralston, though less strong by far, was the quicker, and had the advantage of youth. They swayed and twisted upon each other, the two lean, tough men, like tigers.

Katharine struggled to her feet. In getting up she tried to use her right hand, and uttered another cry of pain, as her weight rested on it a moment in making the effort. It was quite powerless.

In a few seconds the room was full of people. Katharine’s scream had echoed through the open door all over the house. The butler, the footmen, and the housemaids flocked in. The cry was heard even in Robert Lauderdale’s bedroom, and he was not asleep.

The old man started, listened, and raised himself on his elbow, at the same time touching the bell by which he called his nurse. She had gone out upon the landing, to try and find out what was the matter, but ran back at the sound of the bell.

“What is it? What’s happened?” asked old Lauderdale, and there was an unwonted colour in his face.