My great-greatgrandfather David Turnbull was born in 1846 in Alston, Cumberland County, England. In 1868 he married a Margaret Ann Brown who was born in 1850 in York County, England. He worked in the coal mines of Durham County. They had several children. Sara b 1869 at Rosedale Abbey Parish, Yorkshire, George b 1871 at Cleveland Brotton Parish, Yorkshire, John b 1872 at Shildon Parish, Durham, Anna b 1878 at Ferry Hill Parish, Durham, Ada b 1879 at South Wingate Parish, Durham, Margaret b 1887 at Station Town, Durham. In May 1888 they left England and settled in Shawnee, Ohio. In 1894 their last child, Mary was born in Shawnee. All of the children married with the exception of Sara, who is believed to have not survived the voyage. I am looking for descendents of their children and for any siblings of David's.