Moonter, who was the architect who designed your house/outbuildings or barns, what period?.
Your barns and the shape and/or design are almost identical to my mates house n' outbuildings in darkest Galloway and they are so close in stature and make-up that there must be some connection or perhaps they even had a standard off the shelf "outbuilding build back then.
We've almost got the main house finished, just the drawing room left then we are going to start on the outbuildings as you are doing, nice job by the way.
You can't see from this angle but inside the outbuilding quadrangle there is 4 vaulted arched doorways as per yours above with one leading to the walled garden.
This is the exit from the internal quadrangle down to the main house, i've not got any other pics but when i'm up next weekend i'll have a look at the signature and date on the set stones above the entrance and find out the Architect, it's definitely Georgian and i know what family commissioned the house and grounds but i dunno who designed/built it.