Searching for family of Allegheny County resident Phillip Miller. Lived in Shaler Township in 1850. Wife's name unknown. Son David (March 31, 1815-1895) lived in Washington Co. in 1850. David married Mary J. McDonald (1836-1916) ca. 1852. Place and exact date of marriage unknown. Mary and David moved to NE in early 1880s. Phillip had two daughters in 1850, named Mary and Sarah. Their later lives unknown. Land, marriage, and cemetery records sought. County plat map showing ownership in mid-1800s available?