From:-
http://www.britannica.com/ebi/article-9324112Rose Fyleman
(1877–1957). The English children's writer Rose Fyleman is remembered primarily for her poems about fairies. She was also a teacher, translator, editor, singer, and lecturer.
Rose Amy Fyleman was born on March 6, 1877, in Basford, Nottinghamshire, England. She began writing as a girl, creating poems and rhymes for family gatherings. She studied to become a teacher but left the University College in Nottingham without fulfilling all of the requirements. She then studied singing in Berlin, Paris, and London, where in 1903 she made her professional singing debut. While performing and giving voice lessons in London, she began to write poetry.
Fyleman did not begin writing seriously until her poem Fairies at the Bottom of Our Garden was published in Punch magazine in 1917. She became a favorite among the magazine's readers, and soon her poems were published in book form. The success of her first collection, Fairies and Chimneys (1918), allowed Fyleman to give up her job as an assistant in her sister's elementary school to become a full-time writer. Her subsequent collections of fairy verse include The Fairy Green (1919), The Fairy Flute (1921), and Fairies and Friends (1925).
In addition to her fairy poems, Fyleman wrote plays and fiction for children. Her plays were published in such collections as Eight Little Plays for Children (1924) and Nine New Plays for Children (1934), and her stories appeared in Forty Goodnight Tales (1923), The Adventure Club (1925), and other books. Her other collections of verse include A Princess Comes to Our Town (1927) and Fifty-One New Nursery Rhymes (1931).
In 1923 Fyleman founded the children's magazine Merry-Go-Round, which she then edited. She also wrote information books and opera librettos. She died in London on Aug. 1, 1957.
But the question still remains...
how did Rose come to write this poem?