Just to add a bit of "data" to the account, this episode is described in
High Flew the Falcons by Herbert Molloy Mason, Jr. The "sortie" took place on 22 March 1915. At that time,
Caporal Navarre was flying with M.S.12, flying Morane two-seaters. The normal armament at that time was a revolver and a Winchester saddle gun. The alert "Zeppelins over Paris!!" was sounded just after 0300 hrs. Navarre, dressed in his pajamas under his leather flying coat, and his observer, a
Lieutenant ran to their machine. The observer was startled to see Navarre jump down from their machine, run into the cook shack, and return holding something in his hand. Navarre scrambled back into the Morane, and waved the chocks away. Upon reaching the area where the Zeppelin was supposed to be, there was nothing to be seen. Then suddenly, Navarre spotted what he took to be the hostile airship, and gave chase. He climbed at the verge of stalling for 15 minutes, without seeming to gain any ground whatever on his "prey". The observer was the first to realize that they had been chasing a cigar-shaped cloud, and tried to get Navarre's attention. It was at this point that the observer realized that the object Navarre had fetched from the squadron kitchen was a large butcher knife. The thoughts of the observer, sensing at that moment that a madman might be flying him around in the pre-dawn light, are not recorded. The tension was soon relieved when Navarre also recognized that he was chasing a cloud, and he and his observer were able to have a good laugh at their own expense.
Just a little more than a week later, on 1 April 1915 appropriately enough, Navarre was to achieve his first aerial victory, an Aviatik, brought down by only three shots from Lt. Roberts' Winchester. Two shots hit the radiator, and the third wounded the pilot. The Aviatik landed behind French lines, and was captured intact.