The word logan comes from the Cornish ‘logging’, meaning rocking, and refers to a select number of rocks which, through some a happy accident and the work of millions of years of weathering, are on a pivot. These giant stones can be rocked with only small effort despite their enormous weight.
“Thither, youths,
Turn your astonish’d eyes; behold yon huge
And unhewn sphere of living adamant,
Which, poised by magic, rests its central weight
On yonder pointed rock: firm as it seems,
Such is the strange and virtuous property,
It moves obsequious to the gentlest touch
Of him whose breath is pure; but to a traitor,
Though even a giant’s prowess nerved his arm…”