What acting part did Larry McMurtry play in Lonsome Dove?

Larry McMurtry did not play an acting part in "Lonesome Dove." He is the author of the Pulitzer Prize-winning novel on which the miniseries is based. The story features characters like Woodrow F. Call and Augustus "Gus" McCrae, portrayed by Tommy Lee Jones and Robert Duvall, respectively. McMurtry's contribution was as the creator of the narrative rather than as an actor.