sent you a private email - Intack #129 north of Getchveg + Ballaquark - judging from description in 1740 Lib assed it might well be just to south of road running north west off old Laxey to Ramsey road (at onetime) Ballaragh Methodist chapel towards Clarum - road becomes a path heading towards Slieau Ouyr.
UK grid ref approx SC447855 which should allow you to see on googlemap - all the Lonan lib assed info to appear on cd_rom version of Manxnotebook