I'd like to get words and music to songs about nurse Edith Cavell, executed by Germans in 1915 for helping British, French and Belgian soldiers escape enemy lines. Edith Cavell memorial website

British Theatre and the Great War, 1914–1919 includes an article on pp 140-158 'A Sweet Tribute to Her Memory': War-time Edith Cavell Plays and Films by Veronica Kelly which mentions three songs.

One song I had already looked for on line as it was mentioned by Keberoxu in the Murdoch Maclean thread:   
"'Nurse Cavell Lament. Words by Murdoch Maclean. Music by Malcolm Macfarlane. Edited and arranged by Arthur W Marchant, Gaelic and English words. All profits for the 'Scottish Edith Cavell Fund'. Sung by Sergt. -Major Colin Macleod, celebrated Gaelic tenor. Dedicated with permission to the Heroine's Mother, Mrs L S Cavell'
Recording is held by the Royal London Hospital Archives and Museum [Maclean wrote English language lyrics, Macfarlane set to music and wrote Scottish Gaelic lyrics]

Also: "Remember Nurse Cavell!" Words by Gordon V. Thompson, music by Jules Brazil (1915) and "All for Her Country's Sake" by L Silberman and Mason Dixon[!] (1917)

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"She was an Angel of Mercy" Sung by Stanley Kirkby comemorating Nurse Edith Cavell (youtube)

two songs in US Library Congress holdings
"Edith Cavell" Browne, Raymond A. -- 1871-1922 (composer) Emerson, C. K. (lyricist) and Edith Cavell; Gilliland, Alton B. (lyricist)
Both songs Created &/or Published: 1919. Downloadable pdf copies available for these two.

Standing as I do in view of God and eternity, I realise that patriotism is not enough.
I must have no hatred or bitterness towards anyone.
Edith Louisa Cavell, October 11th 1915