I'm looking for two sisters going to USA together, perhaps later a brother followed. They had (not only) a sister, called Auguste Wilhelmine Radtke, born 1874 in Espenhagen, Flatow, Prussia (and sometimes Poland, than called Ossowke). Nobody in the family knows, how the immigrating persons were named.
We know, at least one sister married in USA and sent some letters home. What about your Amelia, do you know more about her?