Stoke Climsland employed a lot of people from across Cornwall, and no doubt Gwennap LEAN's ended up there, as did my own LEAN ancestors (of Bodmin Moor).
My ancestors William LEAN (1792-1882) and Maria LEAN (1799-1873) came from separate LEAN families.They married in Blisland 1819. They had several children, many born in Blisland. But a number of their younger children were born at Stoke Climsland, including my ancestor Eliza Jane Lean (b. 21-Dec-1835 'Lidwell' Stoke Climsland).
Maria LEAN is listed with her children in the 1841 Census, though eldest son Edmund and husb. William are away.They could have been working in the mine, which was about a mile away from their home.In 1847 the family emigrated to Jefferson Co. Wisconsin.
I'm not familiar with Stoke Climsland, but I'm happy to assist others where I can.No doubt, because of the mine, a number of Cornish families settled there, but only for a brief while before migrating elsewhere.