This is traditional nursing uniform of the era possibly 19th century. Not sure if a nurse maid would wear the same uniform as a trained nurse, although all nurses in those days would have worked for the wealthy known today as private care. Even when I worked at sea as a nurse we were private. My ship was British, but we were not part of the NHS. So it is possible a nurse on sailing ships looked after all passengers and crew as myself and colleagues did. And my uniform was starched, just like nurses starched uniforms of yesteryear. When in whites, my trousers would stand up on their own