He shook his head.
"No one knows. The man got away. I bought an evening paper as I came along and I see they haven't arrested any one yet."
"Was there a quarrel?" she asked.
"Nothing of the sort," he replied. "The other man seemed simply to have run out from somewhere and stabbed him with one thrust. I saw it all but I was powerless to interfere."
"You saw the man who did it?" she asked.
"Only his arm," Arnold answered. "He kept his body twisted around somehow. It was a blackguardly thing to do."
"It was horrible!" she murmured.
There was an interruption. The piece of tattered curtain which concealed the portion of the room given over to Isaac, and which led beyond to his sleeping chamber, was flung on one side. Isaac himself stood there, his black eyes alight with anger.
"Liar!" he exclaimed. "Liars, both of you!"