The Red Cross Barge by Marie Belloc Lowndes

There came a series of loud, excited rappings on the door. It burst open, and a little girl -- a child to whom in the past, which now seemed aeons away, she had been kind -- stood breathless, smiling, 'Mamselle! Mamselle! Our soldiers are here! Come and see them. I ran away from mother to tell you! They said you were here.'

Jeanne Rouannes put a finger to her lips. She gave a swift look at the unconscious form stretched stiffly out on the narrow bed. If only she could get a surgeon now, at once --