Green, Anna Katharine: The Mayor's Wife. v1. 21 Feb 2016
 

Anna Katharine Green (November 11, 1846 – April 11, 1935) was an American poet and novelist. She was one of the first writers of detective fiction in America and distinguished herself by writing well plotted, legally accurate stories. Green has been called "the mother of the detective novel".

Excerpt
“You are discreet, and you evidently desire a position. You will find a gentleman in my sitting-room. If you come to terms with him, well and good. If not, I shall expect you to forget all about him and his errand the moment you leave his presence. You understand me?”