Book excerpt: As law enforcement officer and game manager for the Florida Game and Fresh Water Fish Commission, Lt. Tom Shirley was the law in one of the last true frontiers in the nation--the Florida Everglades. In Everglades Patrol, Shirley shares the stories from his beat--an ecosystem larger than the state of Rhode Island. His vivid narrative includes dangerous tales of hunting down rogue gladesmen and gators and airboat chases through the wetlands in search of illegal hunters and moonshiners. During his thirty-year career (1955-1985), Shirley saw the Glades go from frontier wilderness to "ruination" at the hands of the Army Corps of Engineers. He watched as dikes cut off the water flow and controlled floods submerged islands that had supported man and animals for 3,000 years, killing much of the wildlife he was sworn to protect.