Description of the bed chamber of countess Cornelia Bandi as discovered by her maid one morning in 1731, reprinted in the Philosophical Transactions of the Royal Society of London, 1745:

Four feet distance from the bed there was a heap of ashes, 2 legs untouched, from the foot to the knee, with their stockings on: between them was the lady’s head: whose brains, half of the back part of the skull, and the whole chin, were burnt to ashes; among which were found 3 fingers blackened. All the rest was ashes, which had this particular quality, that they left in the hand, when taken up, a greasy and stinking moisture.

… The bed received no damage; the blankets and sheets were only raised on one side, as when a person rises up from it, or goes in; the whole furniture, as well as the bed, was spread over with moist and ash-coloured soot, which had penetrated into the chest-of-drawers, even to foul the linens; nay the soot was also gone into a neighbouring kitchen, and hung on the walls, moveables, and utensils of it. From the pantry a piece of bread covered with that soot, and grown black, was given to several dogs, which refused to eat it.

“It is impossible that by any accident the lamp should have caused such a conflagration,” remarks the correspondent. “There is no room to suppose any supernatural cause. The likeliest cause then is a flash of lightning.”