In their 1951 "The Oxford Dictionary of Nursery Rhymes", Iona and Peter Opie write that the rhyme has been tied to a variety of historical events or folklorish symbols such as the queen symbolizing the moon, the king the sun, and the blackbirds the number of hours in a day; or, as the authors indicate, the blackbirds have been seen as an allusion to monks during the period of the Dissolution of the Monasteries by Henry VIII, with Catherine of Aragon representing the queen, and Anne Boleyn the maid. The rye and the birds have been seen to represent a tribute sent to Henry VII, and on another level, the term "pocketful of rye" may in fact refer to an older term of measurement. The number 24 has been tied to the Reformation and the printing of the English Bible with 24 letters. From a folklorish tradition, the blackbird taking the maid's nose has been seen as a demon stealing her soul.