This March, Simon & Schuster will publish Novel History: Historians and Novelists Confront America’s Past (and Each Other) , a fascinating anthology edited by Mark C. Carnes in which historians offer essays on historical novels and the authors of these novels reply to them. In it, Elliott West speaks with warmth and appreciation of Lonesome Dove , the definitive Western novel of recent years (although he does wonder how its cowboys drove their charges north without encountering the tracks of the Union Pacific). In his brief response, Larry McMurtry tells of the genesis of his 1985 book.