It is a Ceremony, never omitted among the Vulgar, to draw Lots, which they Term Valentines, on the Eve before Valentine-day. The Names of a ſelect Number of one Sex, are by an equal Number of the other put into some Veſſel ; and after that, every one draws a Name, which for the preſent is called their Valentine, and is alſo look’d upon as a good Omen of their being Man and Wife afterwards.
In her letter, Margery describes John as her “right well-beloved Valentine”. She goes on to say “I am not in good health of body nor of heart, nor shall I be till I hear from you.” She explains that her mother tried – so far unsuccessfully – to persuade her father to increase her dowry. However, she claims “But if you love me, as I trust verily that you do, you will not leave me therefore.” The couple eventually married.
There is a rural Tradition, that on this Day every Bird chuſes its Mate. From this perhaps the youthful Part of the World hath firſt practiſed this Cuſtom, ſo common at this Seaſon. 
 Henry Bourne M.A., Antiquitates Vulgares: or, The Antiquities of the Common People, J. White, Newcastle, 1725, pp. 174-5.