If you would like to read a more factual account of this mysterious phenomenon, and see pictures of the marked monument, you'll find an interesting article at http://www.roadsideamerica.com/story/6159. This writer recounts the legend of the burning of a witch; other versions feature other causes of her death, including her hanging
But, of course, I had to give that legend my own interpretation, which I include below:
THE GRAVE DANCER
The judge looked down with an angry frown; "My judgment has been made."
"But, Your Honor, I’m not guilty of the crimes they have accused.
Not demon-possessed; I’ve cast no spells, nor witch-craft have I used."
And I’ll haunt you for-ever if you hang me!"
But those who came from far and near shed not a tear for me.
Not many moons hence, that judge also died; an unexpected demise.
The folks in town who called him friend grieved him with tear-filled eyes.
On the judge’s gravestone, when un-veiled, was the outline of my foot!
They wiped and scrubbed; they sanded and chipped; but it would not go away.
Ah, justice at last, for my footprint remains on that judge’s grave to this day!
(I'm working on a tune to set this poem to, but that's much harder to send by e-mail!)
I hope you enjoy my poetic version of that old Maine legend!