Question: What is similarity between Ivor Gurney and Robert Walser?

Context paragraphs:
Ivor Gurney: Ivor Bertie Gurney (28 August 1890 – 26 December 1937) was an English poet and composer, particularly of songs.

Barnwood House Hospital: Barnwood House Hospital (1860–1968) was a private mental hospital in Barnwood, Gloucester, England.  It was founded by the Gloucester Asylum Trust in 1860 as Barnwood House Institution and later became known as Barnwood House Hospital.  The hospital catered for well-to-do patients, with reduced terms for those in financial difficulties.  It was popular with the military and clergy, and once counted an Archbishop amongst its patients.  During the late nineteenth century Barnwood House flourished under superintendent Frederick Needham, making a healthy profit and receiving praise from the Commissioners in Lunacy.  Even the sewerage system was held up as a model of good asylum practice.  After World War I service patients, including war poet and composer Ivor Gurney, were treated with a regime of psychotherapy and recreations such as cricket.

Ethna Carbery: Ethna Carbery (born Anna Johnston, 3 December 1864 – 2 April 1902) was an Irish journalist, writer and poet.  She is best known for the ballad "Roddy McCorley" and the "Song of Ciabhán"; the latter was set to music by Ivor Gurney.  Along with Alice Milligan she published two Irish nationalist magazines.

Stretcher: A stretcher, litter, or pram is an apparatus used for moving patients who require medical care.  A basic type (cot or litter) must be carried by two or more people.  A wheeled stretcher (known as a gurney, trolley, bed or cart) is often equipped with variable height frames, wheels, tracks, or skids.  In American English, a wheeled stretcher is referred to as a gurney.  The name comes from a horse-drawn cab patented in the USA by J. Theodore Gurney in 1883 which bore a similarity to early wheeled stretchers.

Joseph Campbell (poet): Joseph Campbell (July 15, 1879 – June 1944) was an Irish poet and lyricist.  He wrote under the Gaelic form of his name Seosamh Mac Cathmhaoil (also Seosamh MacCathmhaoil) Campbell being a common anglicization of the old Irish name MacCathmhaoil.  He is now remembered best for words he supplied to traditional airs, such as "My Lagan Love" and "Gartan Mother's Lullaby"; his verse was also set to music by Arnold Bax and Ivor Gurney.

World War I in literature: Literature in World War I is generally thought to include poems, novels and drama; diaries, letters, and memoirs are often included in this category as well.  Although the canon continues to be challenged, the texts most frequently taught in schools and universities are lyrics by Siegfried Sassoon and Wilfred Owen; poems by Ivor Gurney, Edward Thomas, Charles Sorley, David Jones and Isaac Rosenberg are also widely anthologised.  Many of the works during and about the war were written by men, because of the war's intense demand on the young men of that generation; however, a number of women (especially in the British tradition) created literature about the war, often observing the effects of the war on soldiers, domestic spaces, and the homefront more generally.

A Soldier and a Maker: A Soldier and a Maker is a piece of musical theatre by Iain Burnside on the life story of the First World War poet and composer Ivor Gurney.  It was premiered in April 2012 at the Guildhall School of Music and Drama, with Richard Goulding as Gurney.  The production was designed by Giuseppe and Emma Belli.  It was later adapted into a radio play broadcast on BBC Radio 3 on 29 June 2014 as part of the "Music in the Great War" season.  The radio adaptation retained many of the stage cast.

Robert Walser (musicologist): Robert Walser is an American musicologist associated with the "new musicology".  He is author of the book "Running With the Devil: Power, Gender, and Madness in Heavy Metal Music", concerning heavy metal music.  Walser currently is a member of the faculty and director of the Center for Popular Music Studies at Case Western Reserve University.

Robert Walser (writer): Robert Walser (15 April 1878 – 25 December 1956) was a German-speaking Swiss writer.

A Cradle Song (W. B. Yeats poem): "A Cradle Song" is a poem by W. B. Yeats.  The earlier version by Yeats was set as a war song by Ivor Gurney (1920).

Supporting paragraphs: Ivor Gurney Robert Walser (writer)
Answer: poet and composer