What is the name of this childrens chapter book?

Im trying to remember the name of this civil war era fiction book. Its around a 4th grade reading level. The bucket girl? or something like that, I cannot remember. Its about a girl whos brothers go off to the war, and they are on the confederate side, one is killed I think and the other is captured and held at a POW camp...She later finds him because she is the water bucket girl or something.... If anyone can help me out, that would be awesome.