Peter Ruff and the Double Four by E. Phillips Oppenheim

In these days, the duties of Miss Brown as Peter Ruff's secretary had become multifarious. Together with the transcribing of a vast number of notes concerning cases, some of which he undertook and some of which he refused, she had also to keep his cash book, a note of his investments and a record of his social engagements. Notwithstanding all these demands upon her time, however, there were occasions when she found herself, of necessity, idle. In one of these she broached the subject which had often been in her mind. They were alone, and not expecting callers. Consequently, she sat upon the hearthrug and addressed her employer by his Christian name.

"Peter," she said softly, "do you remember the night when you came through the fog and burst into my little flat?"