But Saruman had slowly shaped it to his shifting purposes, and made it better, as he thought, being deceived- for all those arts and subtle devices, for which he forsook his former wisdom, and which fondly he imagined were his own, came but from Mordor; so that what he made was naught, only a little copy, a child's model or a slave's flattery, of that vast fortress, armoury, prison, furnace of power, Barad-Dur, the Dark Tower. . ."
One of my friends confused Sauron and Saruman, because they sound so alike... Thought Gandalf had just told Frodo that this S person was evil, the maker of this evil ring, then he goes on a trip to just to talk to him! - Very confused!