On the third day we finally saw them. We spotted the Slough Creek Pack, or most of them, standing high atop a partially forested ridge. They were far away, and even through our scopes they were tiny, but you could see their faces, which was astounding. The white snow made their dark bodies easy to track as they moved here and there through the trees. We didn’t see them hunt that day, but we witnessed something far more unusual. As the Sloughs rested in the snow, a lone wolf from another pack approached, moving cautiously up the mountainside. Varley, suddenly excited, urged everyone to zero in on him, because we were about to see something most visitors never would....