From The Grey House:
“I don’t have his number any more. I can call Rebecca or Joseph. What did you forget?” He was reaching for his cell.
“There was another Slayer with us. Name’s Dean. He went looking for something, I don’t know what. Don’t know when he’s coming back. Need to tell Vincent.”
Charlie dialed Joseph’s phone. He doubted Rebecca was still awake. She was the only one able to guard during the day. Joseph answered on the second ring.