subs. phr. (old).In saying, To stumble at the TRUCKLE- (or TRUNDLE-) BED = (RAY) to mistake the chambermaids bed for his wifes. [Formerly a low bed on small wheels or castors was trundled under a standing-bed in the daytime, and drawn out at night for a servant to sleep on.]
16609. PEPYS, Diary, III. 269. My wife and I in the high bed in our chamber, and Willet in the TRUNDLE-BED, which she desired to lie in, by us.