Said to once have been surrounded by a stone circle “like at Callanish” but the stones were broken up and incorporated into field walls.
The surrounding field walls certainly contain much larger stones than you normally see in dry stone dykes.
See Canmore NMRS NB35SE1 and Joolio Geordio’s weblog at themodernantiquarian.com/user/1650/weblog/0/28452 for much more information.