I found a much more detailed 25 inch OS map of Stonypath on the NLS website: Lanark Sheet XXI.14 (Dunsyre). Survey date: 1859 Publication date: 1864. Click on the image for a bigger version. The thrashing mill would have occupied the old barn which is now a hortus conclusus, the last work planned by Finlay for Little Sparta, and realised after his death. Notice the multiple instances of the long S symbol, a mirror-image of Finlay’s beloved proofreading symbol for transposition of letters. These are “area brace” symbols, showing that the lands on either side of a linear feature (stream, fence, path etc.) were part of the same parcel of land.