George Leo Haydock

Peter sat without in the palace: i.e. in the open court below, where the servants had lighted a fire. There came to him a certain servant-maid, the portress, says St. John, xviii. 17. But he denied, saying: I know not what thou sayest. In St. Luke, I know him not: in St. John, I am not. The sense is the same; and Peter might use all these expressions. (Witham)