The traditional legend of enmity between the two heraldic animals is recorded in a nursery rhyme which has a Roud Folk Song Index number of 20170. It is usually given with the lyrics: . The legend of the two animals may have been intensified by the Acts of Union 1707 and it was one year later that William King recorded a verse very similar to the first stanza of the modern rhyme. This seems to have grown to include several other verses. Apart from those above only one survives:
This rhyme was played upon by Lewis Carroll, who incorporated the lion and the unicorn as characters in his 1871 novel Through the Looking-Glass. Here, the crown they are fighting for belongs to the White King which, given that they are on the White side as well, makes their rivalry all the more absurd. Carroll subverts the traditional view of a lion being alert and calculating by making this particular one slow and rather stupid, although clearly the better fighter. The role of the Unicorn is likewise reversed by the fact that he sees Alice as a "monster", though he promises to start believing in her if she will believe in him. Sir John Tenniel's illustrations for the section caricature Benjamin Disraeli as the Unicorn, and William Ewart Gladstone as the Lion, alluding to the pair's frequent parliamentary battles, although there is no evidence that this was Carroll's intention. The rhyme is also the basis of an episode in the 1997 novel Stardust by Neil Gaiman, in which the protagonists of the novel, Tristran Thorn and Yvaine, witness a lion and a unicorn fight over a crown during their travels through an enchanted forest. The accompanying illustration by Charles Vess applies an Art Nouveau style to a realistic depiction of a lion attacking its prey. included an episode titled 'The Lion and the Unicorn.' In the episode, Alfred Pennyworth is revealed to be a former MI6 agent entrusted with one half of a nuclear launch code. The terrorist Red Claw attempts to use truth serum and torture to extract the code, but all Alfred says is "The lion and the unicorn vying for the crown." Red Claw believes it is gibberish until she realizes that 'The Lion and the Unicorn' is the password.
