 Despite the chaplain 's best efforts , the islanders ' isolation and dependence on the bounty of the natural world meant their philosophy bore as much relationship to <unk> as it did to Christianity until the arrival of Rev. John MacDonald in 1822 . Macauley ( 1764 ) reported the existence of five <unk> altars , including a large circle of stones fixed perpendicularly in the ground near the <unk> House on Boreray . 
