Edgar Wallace 
Secret House 

A man stood irresolutely before the imposing portals of Cainbury House, a large office building let out to numerous small tenants, and harbouring, as the indicator on the tiled wall of the vestibule testified, some thirty different professions. The man was evidently poor, for his clothes were shabby and his boots were down at heel. He was as evidently a foreigner. His clean-shaven eagle face was sallow, his eyes were dark, his eyebrows black and straight.