Griffin: They come in numbers far greater than our own.
General Otmin: Numbers do not win a battle.
Peter Pevensie: No, but I bet they help.
When Mrs. MacReady meets the Pevensie children at the train station, the reflector screen is reflected in the lenses of her glasses, as she looks down when she speaks to them. It is also visible when the children first arrive at the house, when Mrs. MacReady says, "There shall be no disturbing of the professor."