Bonjour ā tous
At first I must say I was not at all influenced by Marek answer :Some minutes after the challenge begining I ID the bird but had to wait 12 hours ...
This challenge is going to show once again how difficult it is to tell the story of lesser known aircraft of pre 1914 period .
I have a german source with pics showing :
1- Bristol-Halberstadt Taube I ,with MERCEDES ,four wheels U.C ,looking like a "normal" taube ,with sides radiator but curiously the central wing struts are near paralel !(Halberstadt-Taube in "Eroberung der Luft" p 86)
----IT'S YOUR CHALLENGE ----,the other pic showing a very different aircraft, very little central struts over the wing ,no side radiators ,if I can trust my glasses
2-Bristol-Halberstadt Taube II ,Röver fuselage fins up and down
3-Bristol_halberstadt Taube III ,Röver fuselage ,big fin up only .
4-Bristol-Halberstadt Taube IV ,your third pic ,"normal taube "
5-Bristol-Halberstadt A I ,mordernised Taube ,in the same way than the Ru C 4c for the earlier Ru Taube
At last ,the second pic shows a BRISTOL monoplane ,with its usual rotary:I am not sure at all it has a Taube wing.
Hoping it will help
Richard