midnight
`` You mean our ambulance boy who came over on the boat with you -- the multimillionaire ? '' asked the head of the American Ambulance service . `` The same , '' answered Henry , who turned to me and said in his oratorical voice : `` The plot thickens . '' Then the Frenchman told us the story of the raid : How the airmen had come at midnight , dropped their bombs , killing nurses and doctors , and how the discipline of the hospital did not even flutter . He said that the head nurse summoned all her nurses , marched them to the abri at the rear of the hospital , and stood at the door of the abri , while the girls filed in , and just as the last nurse was going into the dugout with the head nurse standing outside , the airmen dropped a bomb upon her and erased her ! None of the nurses inside was hurt . Two doctors were killed and a number of patients .