O n a January morning in 1938, Pitmiddle’s last resident, James Gillies, closed the door to his cottage for the final time and walked away through the snow. High on the south-facing slopes of the Sidlaw Hills in Perthshire, the village is now little more than a jumble of half-ruined walls gradually being reclaimed by the land. My children pick around the overgrown stones like explorers discovering a lost civilisation, before scampering back through the gate and over the grass to our cabin in a neighbouring field. Called the Pitmiddle Hut, it’s the latest addition to Guardswell Farm, which spans 81 hectares (200 acres) of countryside halfway between Perth and Dundee (an hour and a half from Glasgow or Edinburgh). “People gradually moved away from Pitmiddle’s way of life,” says Anna Lamotte, who runs Guardswell with her husband, Digby Legge, often aided by their four-year-old daughter and a smiley 10-month-old in a vintage pram.…