The historic Trail of Tears could be doubling in size.  A bill is working through Congress that would add to what has been designated as a National Historic Trail.  The House passed a version last week.  Researchers have uncovered 1,500 miles of previously undocumented routes the Cherokee Indians took when they were forceably removed from their homes. They relocated to Indian Terrirtory and what is now Oklahoma.  Dr. Duane King has done his own research on the Cherokee Tribe and says it was research that discovered more detailed information.  "It was only through the research in the National Archives of military payment vouchers, of diaries of people who made the trip and of journal of occurances written by military officers that it was possible to understand the routes that were taken," says Dr. King.  Besides research, Dr. King has also authored books about the Cherokee Tribe and is the Gilcrease Museum Director.  King says despite the volumes of material written about the forced removal of Native Americans, the actual trails taken by the men, women and children were not very well known until recently.