Christmas carols in English first appear in a 1426 work of John Awdlay, a Shropshire chaplain, who lists twenty-five "caroles of Cristemas", probably sung by groups of wassailers, who went from house to house. Although the words may have originated in the 13th century Singing of carols initially suffered a decline in popularity after the Protestant Reformation in northern Europe, although some Reformers, like Martin Luther, wrote carols and encouraged their use in worship. Carols largely survived in rural communities until the revival of interest in popular songs in the 19th century. The 18th-century English reformer Charles Wesley understood the importance of music to worship. In addition to setting many psalms to melodies, which were influential in the Great Awakening in the United States, he wrote texts for at least three Christmas carols. The best known was originally entitled "Hark! How All the Welkin Rings", later renamed "Hark! The Herald Angels Sing". Completely secular Christmas seasonal songs emerged in the late 18th century. "Deck The Halls" dates from 1784, and the American "Jingle Bells" was copyrighted in 1857. In the 19th and 20th century, African American spirituals and songs about Christmas, based in their tradition of spirituals, became more widely known. An increasing number of seasonal holiday’s songs were commercially produced in the 20th century, including jazz and blues variations. In addition, there was a revival of interest in early music, from groups singing folk music, such as The Revels, to performers of early medieval and classical music.