Mysterious Mr. Sabin — E. Phillips Oppenheim / Edward Phillips Oppenheim

When Lord Wolfenden saw, in the supper-room of the Milan Restaurant, a beautiful woman and became acquainted with her by saving the life of her elderly companion, the mysterious Mr. Sabin, as they leave the restaurant, he little knew the web of intrigue into which he was entering. It was impossible not to love the unknown, and it seemed equally impossible to marry her when her identity was known, but Mr. Oppenheim can be depended upon to give his plots that turn which is as admirable as it is unexpected, and this is one of the best of his many good and exciting books.