In the early nineteenth century, printed collections of rhymes began to spread to other countries, including Robert Chambers's Popular Rhymes of Scotland (1826) and, in the United States, Mother Goose's Melodies (1833).[1] We sometimes know the origins and authors of rhymes from this period, such as "Twinkle Twinkle Little Star", which combined an eighteenth-century French tune with a poem by the English writer Jane Taylor, and "Mary Had a Little Lamb", written by Sarah Josepha Hale of Boston in 1830.[6] Nursery rhymes were also often collected by early folk-song collectors, including, in Scotland, Sir Walter Scott and, in Germany, Clemens Brentano and Achim von Arnim in Des Knaben Wunderhorn (1806–8).[13] The first, and possibly the most important, academic collections to focus in this area were James Orchard Halliwell's The Nursery Rhymes of England (1842) and Popular Rhymes and Tales (1849).[14] By the time of Sabine Baring-Gould's A Book of Nursery Songs (1895), child folklore had become an academic study, full of comments and footnotes.