‘After raising Doniert's stone and placing it in an erect position a mass of granite no less than two tons and a half in weight the workmen were directed to dig down by the side of the other monolith. ‘After reaching a depth of about eight or nine feet a hole was discovered. Here they found a cruciform vault eighteen feet in length from east to west and sixteen from north to south the width of the vault being about four feet. The sides were perpendicular and the roof circular and all smoothed with a tool and as level as the rough nature of the naked rock would permit.' The men employed for this task came from South Caradon mine. It was reported that the miners said that it was ‘nothing but old workings in other words ancient mine works.