The Woman in the Alcove by Anna Katharine Green audiobook.
"I was, perhaps, the plainest girl in the room that night. I was also the happiest—up to one o'clock. Then my whole world crumbled, or, at least, suffered an eclipse. Why and how, I am about to relate." Thus begins this mystery told by Anna Katharine Green, one of the first writers of detective fiction in America and renowned for writing well plotted, legally accurate stories