150 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



are those of Magnus, King of Norway (about 1098), of 

 whom we read in the Chronicon Manniae that he obtained 

 timber from Galloway and from Anglesey and erected 

 many forts in the Isle of Man. That at Baldrine may be 

 an example of this period, with others like it. Some 

 round camps also have been considered Scandinavian in 

 origin, such as that still to be traced at St. Mark's, at the 

 head of the valley where the Silverburn arises, and one 

 which was at Ramsey just north of the Ballure stream, on 

 the broogfas now entirely washed away. Mannan's Chair, 

 in German, and one or two others seem to have been some- 

 what similar, but on a larger scale : a notable earthwork 

 is that at Lhergyrhenny, on the west slope of Snaefell, 

 known as the Bow and Arrow Hedge. It is 10 feet higrh 

 on the north side and 15 feet on the south ; 12 feet wide 

 at the base and 6 feet at the top. The ditch on the south 

 is 9 feet to 12 feet wide, and can be traced almost right 

 across a neck of land between two deep streams, for about 

 550 yards. 



But the finest of the camps is that encircling the top 

 of South Barrule (formerly Wardfell). On the northern 

 side of the summit are traces of dry stone walls enclosing 

 an irregular area of about 22,000 square yards, the thick- 

 ness of the base of a wall on the northern side being 

 upwards of nine yards. The approach on this side is an 

 easy ascent ; on the south the wall has been much 

 narrower and weaker, and perpendicular to the brow of 

 the cliff, which is inaccessible : it is filled up inside so as 

 to form a raised way or parapet. Some traces of a roadway 

 into the camp are due to the fact that this spot was selected 

 by the officers of the Trigonometrical Survey of Great 

 Britain for the erection of their instruments for connecting 

 with the triangulation of the British Isles. 



At Ballachurry, in Andreas, is a fort, probably erected 



