Myths and Legends of our Own Land, by Charles M. Skinner, , at sacred-texts.com
In a cellar in Green Street, Schenectady, there appeared, some years ago, the silhouette of a human form, painted on the floor in mould. It was swept and scrubbed away, but presently it was there again, and month by month, after each removal, it returned: a mass of fluffy mould, always in the shape of a recumbent man. When it was found that the house stood on the site of the old Dutch burial ground, the gossips fitted this and that together and concluded that the mould was planted by a spirit whose mortal part was put to rest a century and more ago, on the spot covered by the house, and that the spirit took this way of apprising people that they were trespassing on its grave. Others held that foul play had been done, and that a corpse, hastily and shallowly buried, was yielding itself back to the damp cellar in vegetable form, before its resolution into simpler elements. But a darker meaning was that it was the outline of a vampire that vainly strove to leave its grave, and could not because a virtuous spell had been worked about the place.
A vampire is a dead man who walks about seeking for those whose blood he can suck, for only by supplying new life to its cold limbs can he keep the privilege of moving about the earth. He fights his way from his coffin, and those who meet his gray and stiffened shape, with fishy eyes and blackened mouth, lurking by open windows, biding his time to steal in and drink up a human life, fly from him in terror and disgust. In northern Rhode Island those who die of consumption are believed to be victims of vampires who work by charm, draining the blood by slow draughts as they lie in their graves. To lay this monster he must be taken up and burned; at least, his heart must be; and he must be disinterred in the daytime when he is asleep and unaware. If he died with blood in his heart he has this power of nightly resurrection. As late as 1892 the ceremony of heart-burning was performed at Exeter, Rhode Island, to save the family of a dead woman that was threatened with the same disease that removed her, namely, consumption. But the Schenectady vampire has yielded up all his substance, and the green picture is no more.