billet doux

Sir Philip was actually reading Miss Luttridge's billet-doux aloud when the black entered the library.

Judge of her talents for the game by this instance:—she hid her billet-doux within the lining of Juba's collar.

My dear boys almost daily exchange billet-doux with mother, since their absence of a week at a time from home.

Had this communication been a billet-doux, Peggie could hardly have betrayed more alarm and confusion.

We may fancy Madame La Croix slyly handing the billet-doux to the daughter, under the unsuspecting mother's very eyes.