What a lot of effort when all that was required was for someone to look at a large scale OS map for the area c1900 and at last I got round to it. Lead Yard was in fact the name of a street and if you look at a modern street map of Middle Hillgate in Stockport it is now called Massey Street. Googlemap will find it for you, it is off Lowe Street and roughly behind the Red Bull Inn on Middle Hillgate. Depending when the area was redeveloped there may even be a photo of it as Lead Yard in the Stockport Local History collection.