Roud Folk Song Index in the context of "Tweedledum and Tweedledee"

"Peter Piper" is an English-language nursery rhyme and well-known alliteration tongue-twister. It has a Roud Folk Song Index number of 19745.

Humpty Dumpty is a character in an English nursery rhyme, probably originally a riddle, and is typically portrayed as an anthropomorphic egg, though he is not explicitly described as such. The first recorded versions of the rhyme date from late eighteenth-century England and the tune from 1870 in James William Elliott's National Nursery Rhymes and Nursery Songs. Its origins are obscure, and several theories have been advanced to suggest original meanings. The rhyme is listed in the Roud Folk Song Index as No. 13026.

As a figure in nursery culture, the character appears under a variety of near-rhyming names, such as Lille Trille (Danish), Wirgele-Wargele (German), Hümpelken-Pümpelken (German) and Hobberti Bob (Pennsylvania Dutch). As a character and literary allusion, Humpty Dumpty was referred to in several works of literature and popular culture in the nineteenth century. Lewis Carroll in particular made him an animated egg in his 1871 book Through the Looking-Glass, while in the United States the character was popularised by George L. Fox as a clown of that name in the Broadway pantomime musical Humpty Dumpty (1868).

"Hey Diddle Diddle" (also "Hi Diddle Diddle", "The Cat and the Fiddle", or "The Cow Jumped over the Moon") is an English nursery rhyme. It has a Roud Folk Song Index number of 19478.

"John Barleycorn" is an English and Scottish folk song. The song's protagonist is John Barleycorn, a personification of barley and of the beer made from it. In the song, he suffers indignities, attacks, and death that correspond to the various stages of barley cultivation, such as reaping and malting.

The song may have its origins in ancient English or Scottish folklore, with written evidence of the song dating it at least as far back as the Elizabethan era. It is listed as number 164 in the Roud Folk Song Index. The oldest versions are Scottish and include the Scots poem "Quhy Sowld Nocht Allane Honorit Be". In 1782, the Scottish poet Robert Burns published his own version of the song, which influenced subsequent versions.

"Good King Wenceslas" (Roud number 24754) is a Christmas carol that tells a story of a tenth-century king of Bohemia (modern day Czech Republic) who goes on a journey, braving harsh winter weather, to give alms to a poor peasant on the Feast of Stephen. During the journey, his page is about to give up the struggle against the cold weather, but is enabled to continue by following the king's footprints, step for step, through the deep snow.

The legend is based on a story about Saint Wenceslaus I, Duke of Bohemia (907–935).

"This Is the House That Jack Built" is a popular English nursery rhyme and cumulative tale. It has a Roud Folk Song Index number of 20854. It is Aarne–Thompson–Uther Index type 2035.