

Answer his cleric question with "No" to avoid him getting hostile later.

When you cross the bridge he'll pull the lever, making it impossible for you to cross the bridge again, or you'll fall off if you haven't fully crossed it. He will also be in the Catacombs if you have attacked or killed Petrus, or any of Reah's companions. If you venture down to the Catacombs before Reah and her company, Patches will appear in front of the lever for the second spiked bridge, close to the hidden bonfire. He is quite notable for having a strong distaste for clerics, and his counterpart in Demon's Souls had felt the same way about priests. Patches returns with his deceiving ways to trick you into losing your life and treasures, but will eventually sell you some good cleric gear and other useful items. Have you heard of.Trusty Patches? If ever a man has rubbed me up the wrong way! If he ever comes around again, I swear, I'll have his hide! - Knight Lautrec of Carim Patches the Hyena (Trusty Patches) is a Character in Dark Souls.
