Norton's eyes were again burning into her soul as he asked in a low voice:

"Suppose it does?"

The girl smiled with a puzzled look:

"Suppose it does? Of course, you're only trying to prove that such an impossible barrier might exist! And for the sake of argument I agree that it would be real"—she paused and her breath came in a quick gasp. She sprang to her feet clutching at her throat, trembling from head to foot—"What do you mean by looking at me like that?"

Norton lowered his head and barely breathed the words:

"That is the barrier between you!"

Helen looked at him dazed. The meaning was too big and stupefying to be grasped at once.

"Why, of course, major," she faltered, "you just say that to crush me in the argument. But I've given up the point. I've granted that such a barrier may exist and would be real. But you haven't told me the one between us."

The man steeled his heart, turned his face away and spoke in gentle tones:

"I am telling you the pitiful, tragic truth—your mother is a negress——"