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The bastle at High Shaw survives in a good state of preservation and exhibits a number of unusual features which cannot be paralleled on other known bastles. The Scheduled Monument (List Entry Number: 1009977) includes the remains of a C16th or C17th medieval defended farmhouse, or bastle, situated on gently sloping ground above the steep sided slopes of Watty's Sike. The structure, constructed of massive roughly squared stone blocks and surviving to one storey high, is rectangular in plan measuring 11m by 6m within stone walls 1.6m thick. There is a small square-headed doorway into the byre or basement of the bastle through the east wall, and an unusual triangular window in the west wall, probably a gun loop. Along the top of the walls there is a broad string course, a feature not paralleled on other bastles. There is now no trace of an upper storey, which appears to have been deliberately dismantled. The basement is barrel vaulted NY9398 : High Shaw Bastle - vaulted basement and at the northern end displays a ladder hole, giving access to the upper storey. On the inside of the western wall are the remains of wall cupboards and a fireplace, the latter a secondary feature. Also at the western end of the basement there are traces of socket holes where a low loft was constructed. The bastle is a grade II listed building.
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High Shaw Bastle on Gatehouse: Link

Bastle Houses are often called Peels or Peel Towers:

And he shall sing of Risingham
Lisles-burne, and Stiddell-hill,
Of Darnaw-craggs, and Hareshaw-haggs,
Dyke-nook, and Birky-gill;

Of Penman's-loup and Chesterhope,
Dunn’s houses and Dyke-heid,
Babswood, Bellshiel, and Branshaw-peel,
And a' the peels o' Reed.

THE LAY OF THE REEDWATER MINSTREL by Robert Roxby (1809)