Is it a bargain?" He was so quaintly humorous that I was forced to laugh; and we went together to the drawing-room, where the coffee-cups and tray remained undisturbed as we had left them. 
Someone had disturbed the coffee cups while they weren't in the drawing room. 
mnli hypothesis: Someone had disturbed the coffee cups while they weren't in the drawing room.  premise: Is it a bargain?" He was so quaintly humorous that I was forced to laugh; and we went together to the drawing-room, where the coffee-cups and tray remained undisturbed as we had left them. 