The Stone Wall - Part 2

Every weekend the MN Historical Society has walking tours that start at the James J Hill House and end up going past our house.  Some stop and emphasize the stone wall around the property.  Usually they focus on the unique feature of the top of the wall; the vertical stones.

As the tour guide mentions, it's modeled after walls in parts of Great Britain.  The idea with the vertical stones is that they keep sheep from jumping over the wall.

As far as we know, none of the previous owners kept sheep on the property and we don't have plans to, either...  And the wall wasn't built until the 1920s.

The second photo was taken near Burford in the Cotswolds in England.  The area is known for its sheep.  Though the walls here are dry-stacked, they have a similar vertical stone arrangement on top of the wall.