Bastle at Millhouse Grange (Bardon Mill) - Source of Reference
(2) Ryder, P.F., 1995. Towers and Bastles in Northumberland, Part 4 Tynedale District, Volume 1, 29-30. This is an unpublished report. Further information can be obtained from here.
(3) Further information about the protected nature of this building can be obtained from here.