About 7 o'clock the Gamas company went to relieve the men in the southern trenches. On their way, immediately outside the town, they fell in with a German force of about the same strength as themselves, which had crept up no one knew how. There was a fusillade and a general _mêlée_, in which our sailors opened a passage through the troop with bayonets and butt-ends, disposing of some forty Germans and putting the rest to flight.[47] Then there was a lull. The splash of rain was the only sound heard till 2 a.m., when suddenly a fresh outbreak of rifle-fire was heard near the Caeskerke station, right inside the defences. It was suggested that our men or our allies, exasperated by their life of continual alarms, had been carried away by some reckless impulse. The bravest soldiers admit that hallucinations are not uncommon at night in the trenches. All the pitfalls of darkness rise before the mind; the circulation of the blood makes a noise like the tramp of marching troops; if by chance a nervous sentry should fire his rifle, the whole section will follow suit. Convinced that some misunderstanding of this kind had taken place, the Staff, still quartered at the Caeskerke railway station, shouted to the sections to cease firing. As, however, the fusillade continued in the direction of the town, the Admiral sent one of his officers, Lieutenant Durand-Gasselin, to reconnoitre. He got as far as the Yser without finding the enemy; the fusillade had ceased; the roads were clear. He set out on his way back to Caeskerke. On the road he passed an ambulance belonging to the brigade going up towards Dixmude, which, on being challenged, replied: "Rouge Croix."[48] Rather surprised at this inversion, he stopped the ambulance; it was full of Germans, who, however, surrendered without offering any resistance. But this capture suggested a new train of thought to the Staff: they were now certain that there had been an infantry raid upon the town; the Germans in the ambulance probably belonged to a troop of mysterious assailants who had made their way into Dixmude in the night and had vanished no less mysteriously after this extraordinary deed of daring. One of our covering trenches must have given way, but which? Our allies held the railway line by which the enemy had penetrated into the defences, sounding the charge.... The riddle was very disturbing, but under the veil of a thick damp night, which favoured the enemy, it was useless to seek a solution. It was found next morning at dawn, when one of our detachments on guard by the Yser suddenly noticed in a meadow a curious medley of Belgians, French Marines, and Germans. Had our men been made prisoners? This uncertainty was of brief duration. There was a sharp volley; the sailors fell; the Germans made off. This was what had happened: