It's the burglars!" quavered Mrs. Hignett. In the stress of recentevents she had completely forgotten the existence of those enemiesof society. "They were dancing in the hall when I arrived, and nowthey're playing the orchestrion!
Mrs. Hignett finds herself in a panic as she realizes that burglars are in her home. Amidst the chaos of recent events, she had momentarily overlooked the presence of these criminals. Her astonishment escalates as she recalls their unexpected behavior, having seen them previously dancing in the hall.
Now, instead of fleeing or hiding, the burglars are making music on the orchestrion, which adds an absurd twist to the situation. This revelation reminds Mrs. Hignett of the peculiar nature of her adversaries, highlighting the absurdity of the situation in a typical P.G. Wodehouse fashion.