Sir Clinton Driffield Mystery series #11

There was blood on the drawing-room floor and Hazel Deerhurst had disappeared wearing slippers over walking shoes, two pairs of stockings and a bright silk kimono.

First investigations shed interesting light on Hazel. A mysterious machine is found at her home, some paintings and a cryptic telegram. She was also secretary to a man whose secrets involved the future of the empire. Is she victim or villainess?