Image from The Great War taken in an Australian Advanced Dressing Station near Ypres in 1917. The wounded soldier in the lower left of the photo has a dazed, thousand-yard stare - a frequent symptom of "shell-shock".
<p>Photograph taken by Official War Photographer at an Australian Advanced Dressing Station near Ypres in 1917. The wounded soldier in the lower left of the photograph has the "thousand yard stare" indicative of shell-shock.
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Given that this photo was taken 100 years ago by an employee of the British Government, I believe that copyright has expired and it is now in the public domain.
1917
See below