Source: The Advertiser, June 8, 1866, Ad:

John S. Mills

Has, and will keep constantly on hand, the best selected stock of Hardware and Groceries in town.
If you want "Cheap Goods", give him a call; as he is selling at the lowest market price.

Source: The Manchester Republican, September 7, 1872

John S. Mills is now snugly ensconsed in the room left by Blickenstaff & Martin. John divides his time fairly between his babies and his Hardware Store. When you can't find anything you want anywhere else, go there and get it, he always keeps it.