A French poem, similar to "Thirty days hath September", numbering the days of the month, was recorded in the 13th century.[5] From the later Middle Ages there are records of short children's rhyming songs, often as marginalia.[6] From the mid-16th century they begin to be recorded in English plays.[7] Most nursery rhymes were not written down until the 18th century, when the publishing of children's books began to move from polemic and education towards entertainment, but there is evidence for many rhymes existing before this, including "To market, to market" and "Cock a doodle doo", which date from at least the late 16th century.[8] The first English collections, Tommy Thumb's Song Book and a sequel, Tommy Thumb's Pretty Song Book, are both thought to have been published before 1744, with such songs becoming known as 'Tommy Thumb's songs'.[9] The publication of John Newbery's compilation of English rhymes, Mother Goose's Melody, or, Sonnets for the Cradle (London, c. 1765), is the first record we have of many classic rhymes, still in use today.[10][11] These rhymes seem to have come from a variety of sources, including traditional riddles, proverbs, ballads, lines of Mummers' plays, drinking songs, historical events, and, it has been suggested, ancient pagan rituals.[1] About half of the currently recognised "traditional" English rhymes were known by the mid-18th century.[12]