The traveller returns

"A noblewoman seems to come back from the dead, and Miss Silver must help verify her identityAnne Jocelyn has been dead for some time. She and a friend were killed trying to escape the first German assault on France; her husband, Phillip, survived to bring back her body for burial, after which he joined the war against the monsters who slaughtered his wife. That was three years ago, and now Anne Jocelyn has returned to England. Looking and talking exactly like Phillip’s wife, she insists that he mistook her friend’s body for her own, and buried it by mistake. After three years hiding from the Nazis, she has finally escaped to come back to him. He doesn’t believe her, but she doesn’t care. As far as she’s concerned she is Anne Jocelyn, and the dead woman’s riches are her own. Only the brilliant Maud Silver will be able to divine who should be believed."
"Anne Jocelyn had died tragically three years ago - or so her family had thought. But a woman appreared calling herself Anne Jocelyn and convinced everyone except Miss Silver of her identity."@en