Looking on the National Library of Scotland's online collection of Ordnance Survey maps, I found the following sheet in the _25 inch to the mile, 1st edition of the Ordnance Survey of Scotland, 1855-1882_ :
* Ayrshire XXXV.11 (Old Cumnock)
* Survey date: 1856 to 1857, Publication date: 1858
_Shankston_ appears to be a farm, a wood, and a 'pit' (Ironstone quarry), as shown in the excerpt below:
