A likely birth for 40 year old daughter Margaret in the 1911 census return shows address as Cairn (Ramelton), father as James Davis and mother as Rachel Stevenson, Margaret Anne Davis was born 4 February 1868.
Other children to this James Davis / Rachel Stevenson named couple included Joseph Davy b. 1865, address High Cairn, Ellen Davis b. 1867 (same address), Sarah Jane Davis b. 1870 (same address), Eliza Mary Davis b. 1872 (same address), and Rachel Davis b. 1875. (same address).
A James Davis of High Cairn died on 10 August 1876, he was reported as a 64 year old farmer, informant and present at death was one Rachel Davis of High Cairn.
And just to recap, Rachel Stevenson Davis then had daughter Martha in 1878/9, the father being a George Davis.