Pippin and Gandalf rode to Minas Tirith, because Gandalf knew that time was melting away. They entered the city and went on to Denethor, the steward of Gondor, because he wanted to speak to Pippin. Gandalf told him not to mention Aragorn except he must, because he don't wanted Denethor to knew of the coming of the king (who Aragorn actually was, although no one knew it beside few people). After the speech Pippin was very weary but he asked Denethor to serve him as a guard of the white tower. So Peregrin Took from the Shire became guard of the white tower of Minas Tirith. He was given another guard to show him his tasks and he went of. His guide was named Beregond and he was a captain of the watch. He showed Pippin the rooms of the guards and told him the most common pass-words. Pippin himself told much stories of the shire and so they spent the day with talking.