Thompson Carlsbad Caverns Big Canyon April 24, 1937 Sigon, Wright, & Thompson, but when it gets outside of its own range as it has done everywhere, it becomes a different animal and is harmful. He thinks that it will have to be held in check by poison. The disappearing of poisoning carcasses by the indiscriminate scattering of poison, wait. But he is just afraid of perishable bait distributed in the open country and high mt. fridges. Sigon admits that even this method will get some other animals, but not to any serious extent and that much is unavoidable. He strongly urges the service cooperating with local interests by instructing them in the safe usage of poison. He hates to see the disappearance of the gray wolf, but sees this as a way of keeping it in this country. He thinks a few Mt. Lewis could remain in the Guadalupes.