Who was the author that wrote the nursery rhyme that has the Round Folk Song Index number of 7622?
Liberia; or, Mr. Peyton's Experiments: Liberia; or, Mr. Peyton's Experiments is an 1853 novel by Sarah Josepha Hale, the author of the nursery rhyme "Mary Had a Little Lamb", who wrote the novel under the name of Sara J. Hale. Mary Had a Little Lamb: "Mary Had a Little Lamb" is an English language nursery rhyme of nineteenth-century American origin. Mary Had a Little Lamb:  It has a Roud Folk Song Index number of 7622.
Sarah Josepha Hale