Precisely made limestone fences - from the Totara Estate days of the mid- late 1870s.
By any standards, these are amazing walls and they show effort to fit the ashlar blocks quite precisely. The walls are fully plastered (bagged) with sand mortar on the faces, but the blocks however are substantially dry laid The walls are nearly 700mm wide at the base, tapering to 300 wide at the cap.
The mortar may have been made from burnt lime made on Totara Estate but it may have been made by Jas Everett at his kiln nearby - Everett's Quarry and kiln would be the only kiln operating (from the ones I have found!) early enough to have been the source of supply.
These boundary fences are not recognised by NZHPT (or I think known to it!) and certainly not protected by the Waitaki District Council District Plan. Yet! They are not even included nor referred to at Totara Estate.