Gandalf, his friends, and a small group of Rohirrim then go to Isengard, Saruman's home. But when they arrive it has already been destroyed by the Ents. They also meet Merry and Pippin there. They talk to Saruman, who still hides in his indestructible tower Orthanc. Gandalf cast him from the Order of Wizards. They find the palantír, which was thrown from the tower by Gríma. The Palantíri are magical black stones with which one can see far away things, and communicate with other palantíri. The group leaves Isengard and rests. Pippin steals the palantír and looks in, and because of this is discovered by Sauron. The group flees the place before the Nazgûl find them. Gandalf and Pippin go to Minas Tirith, while the Rohirrim and other members of the Fellowship go back to Helm's Deep.