Discharge certificate royal Dublin fusiliers

"This is my grandfathers James mcassey discharge certificate,he fought in ww1 and was captured in ligne Belgium Dec 1914. He was later recorded singing the song "no one to welcome me home" in September 1917 this recording is available in original and digital form and I heard it for the first time Christmas 2016 this story came to our attention through Mr Ronan McGreevy of the Irish Times."