The Crimson Tide: A Novel by Robert W. Chambers

An American ambulance going south stopped on the snowy road; the driver, an American named Estridge, got out; his companion, a young woman in furs, remained in her seat.
Estridge, with the din of the barrage in his ears, went forward to show his papers to the soldiers who had stopped him on the snowy forest road.
His papers identified him and the young woman; and further they revealed the fact that the ambulance contained only a trunk and some hand luggage; and called upon all in authority to permit John Henry Estridge and Miss Palla Dumont to continue without hindrance the journey therein described.