Hi
I think that Adj Flachaire of Esc N 67 possible was the victor of Lt Lippe, as his 2-s was reported falling within French hold lines, and the two German flyers were made POWs...?
Also DCA claimed a German a/c South Verdun...
The French Air Service claimed a total of 31 e/a shot down destroyed(probably included DCA) in April 1916, and 9 of these fell within French lines.
Strangely The French War Chronicle seems to have more victories claimed in April 1916(and other months) than actually were claimed officially. All these x-tra victories can NOT be explained with a some late confirmations/reconfirmations in my meaning... :-/

Gunnar