Lady Athlyne by Bram Stoker
Joy Ogilvie, the beautiful young daughter of a Kentucky colonel, plays a joke with her friends, pretending to be "Lady Athlyne", after hearing a story about the dashing Irish nobleman Lord Athlyne. Little does she know that half a world away, the real Lord Athlyne is a prisoner of war in a South African camp, where word reaches him that a woman in America is impersonating his wife.