The Ihelian grinned. "We'll watch for a chance of some kind, then. But I will not let you risk your life. We of Ihelos obey the Book, even if our enemy sees fit occasionally to violate the spirit in which it was conceived."

"Tell me something," Mason said. "This feud of yours. What's it all about? You mentioned that Book business once before, and it seems a people with your apparent piety and maturity and general advancement would certainly find a way to arbitrate such a dispute. What are you fighting about?"

Kriijorl's answering smile was thin, and there was a puzzled look in his craggy features.

"We fight because the Book of the Saints says we must!" he answered at length. "And further than that—"

"Yes?"

"Further than that, I'm afraid we do not know!"

Mason felt his features twisting into an incredulous expression despite his efforts to realize and appreciate the wide gap of cultural differences between them.

"Don't know! But you can't fight a war without knowing why! You—"

"It is in the Book of the Saints," the Ihelian said, "and, therefore, it is our command. And—" he looked into the Earthman's face with the slightest hint of a smile, "from what I've learned of Earth's history from your own lips, Lieutenant, what of your own past wars? Who among your own soldiery has really known why he fought?"

"Well, but—" And then Mason returned the smile. "No, it isn't so different, is it? But tell me more about this Book. Is it based on law, religion, ethics?"