I am no master of the Filioque situation but reading the Catholic Encyclopedia brought up this point:

[quote:2e651xka]Even the Greek Orthodox grant that the Latin Fathers maintain the Procession of the Holy Ghost from the son. . . . since the Greek and Latin Fathers before the nineth century were the members of the same Church, it is antecedently improbable that the Eastern Fathers should have denied a dogma firmly maintained by the Western.[/quote:2e651xka]

[url:2e651xka]http://www.newadvent.org/cathen/06073a.htm[/url:2e651xka]