Chapter VI: Part II: The Thought Body, or the Double

"And as Peter knocked at the door of the gate, a damsel came to hearken, named Rhoda. And when she knew Peter's voice, she ran in and told how Peter stood before the gate. And they said unto her, Thou art mad. But she constantly affirmed that it was even so. Then said they, It is his angel (or double)."--Acts xil. 13-15.