Moreover, every minimal free and discrete isometric action of "F""n" on a real tree with the quotient being a metric graph of volume one arises in this fashion from some point "x" of "X""n". This defines a bijective correspondence between "X""n" and the set of equivalence classes of minimal free and discrete isometric actions of "F""n" on a real trees with volume-one quotients. Here two such actions of "F""n" on real trees "T"1 and "T"2 are "equivalent" if there exists an "F""n"-equivariant isometry between "T"1 and "T"2.