"Camiers Siding - a Vad convoy unloading an ambulance train at night after the Battle of the Somme" Four female figures in uniform are carrying a stretchered figure from an ambulance towards the open carriage of a train bearing a red cross. A standing sihouette and another figure on a stretcher are visible in the lit doorway of the train, while the front of another ambulance is just visible at the left of the scene