For answer Mrs. Dent rose with a stiff jerk and threw open the door.

"Agnes!" she called. "Agnes!" Then she turned and eyed Rebecca. "She ain't there."

"I saw her pass the window," said Rebecca in bewilderment.

"You must have been mistaken."

"I know I did," persisted Rebecca.

"You couldn't have."

"I did. I saw first a shadow go over the ceiling, then I saw her in the glass there"—she pointed to a mirror over the sideboard opposite—"and then the shadow passed the window."

"How did she look in the glass?"

"Little and light-haired, with the light hair kind of tossing over her forehead."

"You couldn't have seen her."