I'd put my money on Martinsyde Elephant. Look at this youtube video:
at 0:07 you can see the wing support mountings matching the picture
at 0:34 you can see the wing root structure which matches the picture.
at 0:55 you can see the upper wing matching the picture.
That camera is C-type, so post summer 1915 but later on the L-model was introduced which was placed inside the hull. This fits the 1916 time frame.
On this picture of a G102 Elephant the similarity to the AC on the picture on your post is significant.
Edit: I'll add that based on the "reliable" interweb wiki the ninth wing was originally RFC HQ Wing and used Martinsyde G.100's from mid 1916 till 1917 and was used in recon missions in France and Middle-east. Someone better in the know on RFC units and their posts can confirm, complete or prove me wrong...