My Scrutiny of the Mormons—Employment as an Indian Trader—Acquaintance with "Winter Mormons"—A Proposition of Theft—Loomas Threatens my Life—My Resolve to Kill him—He Finds his Death at Other Hands.My Baptism—Walker, the "Napoleon of the Desert"—Raids in Lower California—He Tricks the Mexicans—Extinction of the Tribe.CHAPTER IV.