From Protector of the Grey House:
She paused again, and Vincent went to stand behind her and placed a restraining hand on her shoulder. She looked as if she wanted to pounce on Anthony. “I went. I had no desire to hurt the Slayers; they gathered knowledge, not bodies. I arrived at their apartment and Wayne was there, captured, and tied to the wall. There were six Slayers there I had never met, along with the four that I had been talking to. Apparently, Wayne didn’t know not to look through Slayer’s windows. The four I knew had seen him and called reinforcements. When I arrived, two of the fighters captured me; I let them, as I wanted to understand what was going on. I recognized Wayne but wasn’t sure why he was there.”
Cat Stark 