According to information received, he was on a photographic reconnaissance in his FE2d aircraft with three others near Douai (where there is a German aerodrome). They were attacked by German planes and Aubrey was shot down.
The FE2d is a strange aircraft, where the pilot has the observer/gunner in front of him and the propeller behind him. It is said to be rather slow when compared with the German aeroplanes.
There is as yet no information to say that Aubrey survived his crash, but with both Capt. William Leefe Robinson and 2nd Lieut. Peter Warren in captivity, we can hope that Aubrey may have joined them in a prisoner of war camp.
When war broke out Aubrey, along with many of his contemporaries, joined the army. He served with the North Staffs Regiment in Gallipoli, where he contracted jaundice and had to return home. Once fit again, he asked to transfer to the RFC and trained as a pilot. He joined 25 Squadron in France in April 1917.
Aubrey is the younger brother of 2nd Lieut. Leslie de Selincourt (OBLI), who was badly wounded helping to relieve Kut last year.