The Red Cross Barge by Marie Belloc Lowndes

Jeanne Rouannes tended the Herr Doktor all that long, still, cloudless day, as together they had tended so many wounded men during those days and nights which had seemed, to her at least, to contain an eternity of painful effort and strain, of dull despair, of agonising sights.

But here, in this clean, water-lapped little cabin-room, there reigned a delicious quietude, only broken by the drowsy murmur of the river which flowed swiftly just outside, past the wooden walls of the barge. From far off, making the stillness the more intense, came the deep booming of great guns, but with the falling of night that also ceased.