Book excerpt: Award-winning husband-and-wife folklorists Randy Russell and Janet Barnett have gone to the dogs. Digging deeply through the rich field of Southern folklore, the authors have discovered that a dog's devotion to its human does not always end at the grave. Dogs can be as peculiar as people. Their relationship with humans is complex. In story after story from Southern homes, there is strong evidence that this relationship can extend beyond death. Do dogs return from the other side to comfort and aid their human companions? You bet your buried bones they do.