Sketch of Circle at Seanhinny, Midmar Aberdeenshire; Altar stone on the West, 17 feet long, 4.8 Broad, 2.9 thick, columnar stone at each end of the altar, one is 7.10 in height, 4.1 in Breadth, the other 6.9 in height, 5.6 in Breadth, the remaining…