Frank Sidgwick (1879-1939) was a British author and editor. He graduated from Trinity College, Cambridge in 1901 and co-founded the publishing company Sidgwick and Jackson in 1908. He was the author of: The Sources and Analogues of 'A Midsummer-Night's Dream' (1908), Love and Battles (1909), Some Verse: By F. S. (1917) and More Verse (1921) but is primarily known as the editor of collections of poetry, such as: Legendary Ballads (1900), The Poetry of George Wither (2 volumes) (1902), Popular Ballads of the Olden Time (in four series), First Series: Ballads of Romance and Chivalry (1903), Second Series: Ballads of Mystery and Miracle and Fyttes of Mirth (1904), Third Series: Ballads of Scottish Tradition and Romance (1906) and Fourth Series: Ballads of Robin Hood and Other Outlaws (1912), Old Ballads (1908), Ballads and Lyrics of Love (1908), The Cavalier to His Lady: Love-Poems of the Seventeenth Century (1909), Ballads and Poems Illustrating English History (1927) and The Complete Marjory Fleming: Her Journals Letters and Verses (1934).