They recorded it plainly on the first edition map as "Windmill stump", sitting on a raised field in the townland of Knock, and that laconic note is now almost the only formal record the structure left behind. There is no grand ruin, no local legend attached to a named miller, just a residual earthwork on a ridge and the faint logic of a location chosen for its exposure to the wind.

The dating of the mill relies on a process of elimination. John Rocque's map of 1760 makes no mention of any windmill in Knock townland, which suggests the structure was built sometime in the decades between Rocque's survey and the Ordnance Survey recording of its remains, placing its likely construction in the later eighteenth century. Windmills of that period were typically tower mills, built in stone, and used for grinding grain on agricultural estates or for drainage purposes. Whatever this one was used for, it was already reduced to a stump before anyone thought to write much about it. The research compiled by Geraldine Stout and updated by Christine Baker gives no further detail on ownership or function, and none should be assumed.

The site sits alongside a road that climbs a high ridge, with a reservoir lying to the south and the undulating hills around Knockbrack visible to the north. It is the kind of elevated position that would have made good sense for a mill builder, catching whatever westerly wind came in across the open ground. Today the high ground is covered in gorse and long grass, and the land drops sharply away to fenced-off pasture below. There is nothing obviously signposted, and the remains are subtle enough that a visitor without the first edition OS map as a reference might walk past without registering anything unusual. The clearest reward here is the view and the quiet exercise of imagining what the ridge would have looked like when the mill was still standing and turning.