A Fall-Out of Thieves — John Newton Chance

When Jonathan Blake fell asleep one afternoon and woke to find he had a butler he thought he had seen somewhere before, and then other strange visitors began to stroll into his house and take up station, a dream seemed the only possible explanation. That was until guns started shooting and people started bleeding, and Blake found his aeroplane had been stolen and then returned. After that he realized these were not a gang of lunatic strangers from a dream but very dangerous villains indeed...