High Holms bastle, Hexhamshire. Photo by Peter Ryder.

One of the farm buildings at Holm House is a late 16th or early 17th century bastle. It is a rectangular building measuring about 10.8m long by 6.8m wide with walls over one metre thick made of large rough stones. It is one of the best preserved bastles in the parish, with only a few alterations. Outside, it has its original byre doorway with a drawbar tunnel and a harr socket, narrow openings or slit vents through the walls and an external stone staircase to the first floor. Inside, some of the first floor beams seem to be original, as is the fireplace on the first floor and the roof trusses. (1,2,3)

Additional reference. (4a)