There's a book to be written about this anthology, by somebody who knows Oxford, English publishing history, and the First World War. These poets came up in the short Georgian period, so there is nature, mythology, and twilight, metred and rhymed. Tolkien is often spoken of as a twentieth-century outsider, but in this book you can see him as a member of a cohort. Sayers went on to become a medieval scholar, and Haldane kicked the phrase Middle Earth around in her career.
The poets are:
Gerald Crow, Eric Dickinson, Esther Lilian Duff, T.W. Earp, Godfrey Elton, H.R. Preston, Russell Green, Naomi M. Haldane, H.C. Harwood, A.L. Huxley, Leslie Phillips Jones, R.S. Lambert, Agnes E. Murray, Robert Nichols, Elizabeth Rendell, L. Rice-Oxley, Dorothy H. Rowe, Dorothy L. Sayers, Eric Earnshaw Smith, G.B. Smith, Hasan Shahid Suhrawardy, E. Graham Sutton, J.R.R. Tolkien, Sherard Vines, H.T. Wade-Gery.
You can read Oxford Poetry 1915 in its entirety here.