Interesting, never saw handwritten 1880 census til I looked it up. The one I found before was from LDS family search site, amy many years ago. Which says George (Georgia) is son, not adopted but says the same for Walter Luzader. The 1870 census doesn't say George is adopted & 1900 census George is married. There are mistakes in census records though. IF George is adopted, my guess would be from one of Sida's brother because he has same last name in that census, while Walter does not.
I have no clue who Mary Murphy is, seen that on marriage record too, tried to research but found nothing. I have George's death record, says Sida & Jennie are his parents. Good question if he is adopted or not.
George is my great grandfather, through youngest son Oral, through is daughter Martha.
How are we related?