The Sea Fairies is a children's fantasy novel written by Frank Baum, and published in 1911. Baum dedicated the book to Judith of Randolph, Massachusetts - most likely one of the child readers who corresponded with the author. As an underwater fantasy, Baum's The Sea Fairies can be classed with earlier books with similar themes. The story is about Mayre Griffiths, nicknamed Trot is a little girl who lives on the coast of southern California. Her father is the captain of a sailing schooner, and her constant companion is Cap'n Bill Weedles, a retired sailor with a wooden leg. Trot and Cap'n Bill spend many of their days roaming the beaches near home, or rowing and sailing along the coast. One day, Trot wishes that she could see a mermaid; her wish is overheard, and granted the next day, when mermaids invite to visit their kingdom in the ocean.