* Lives of the English Authors and Poets (with George Saintsbury, 1889)
* The Great War's Tragedy and Triumph (with C. E. M. Joad, 1916)
* The Booklovers' Anthology of Verse (with Alfred Noyes, 1920)
* The Golden Treasury of Verse (with Arthur Quiller-Couch, 1922)
* The Living Age (1922–1932)
* The World's Best Literature (32 vols., 1933)
* The Encyclopedia Britannica (14th edition, 24 vols., 1929)
* The Encyclopedia Britannica (15th edition, 24 vols., 1974)
* The Encyclopedia Americana (30 vols., 1918–1920)
* The Encyclopedia Americana (31 vols., 1932)