The unnamed emissary was probably a Nazgul .
The last of the Seven was taken from Thrï¿½in II , who had been captured , imprisoned , and tormented by Sauron ( in the guise of the Necromancer ) in .In the year before Frodo and Sam left the Shire with the One Ring , Sauron , through an unnamed emissary ( The Mouth of Sauron ) , promised the return of the three remaining Dwarven Rings of Power in exchange for the murder of the thief from the Shire and the return of the One Ring ( though described by Sauron as a trinket ) .
Rings of Power