Leighton, many mills had farms attached, the miller would have an assistant, that would be your ancestor and Henry Wilson would be the farmer/miller. By 1841 the old system had broken down due largely to competition from large steam powered mills in nearby towns, abolition of mulctures which therefore gave tenants the freedom to choose their own miller, and widespread importing of flour. Many mills were purchased by the tenant from the estate and whereas the farm was formerly an adjunct to the mill, the reverse became the case and the mill, if it survived in use, switched to grinding animal feed etc' or oatmeal if there was still a market locally.
Milling was carried on in families, but Wilson's son, if he had one, maybe thought that by then the business wasn't worth his while.
In the 18th century a miller was a tacksman, he took a tack (lease) on the mill and took his cut of all the corn ground, mainly oats then but also pease & beans, which he took to market. His assistant had his wee cut also. This was much resented by the lairds tenants who were thirled to that mill, particularly as the miller also had the power to smash any hand querns found being used and compel forced labour re' the mill's upkeep.
hanes teulo, I think this refers to the mill on the Water of Leith, which runs through Colinton Dell. A very long lease offered? competition from huge mills in Leith itself so possibly specialising in pot-barley for soup, or beremeal, farm also attached.
Good stuff guys.
Interesting thought Imber, note the mill lade on Ambly's map at Colinton kirk, serves three mills.
Jinkabout used for both mills at the same time also!