Perhaps she just looked first into the bouquet, to see whether there was a billet-doux hidden among the flowers; but there was no letter.
-- William Makepeace Thackeray, Vanity Fair
Young lovers in Victorian England, forbidden to express their affection in public and fearful that strict parents would intercept their billets-doux, sent coded messages through the personal columns in newspapers.
-- Susan Adams, "I've got a secret", Forbes, September 20, 1999
