What is mock turtle song?

Mock Turtle Song is a traditional English song dating back to the 18th century. It gained popularity in the 19th century as a popular tune for dancing. The song tells the story of a mock turtle, a fictional character from Lewis Carroll's book Alice's Adventures in Wonderland. In the book, the Mock Turtle is known for being melancholy and for telling elaborate and confusing stories. The song is a parody of sentimental ballads and was part of the music hall tradition. It has been performed and recorded by various artists over the years, including Grateful Dead, Joan Baez, and John Renbourn. The song's lyrics and melody have undergone several adaptations over time, and it has become a popular folk song in many English-speaking countries.