The fatal day was announced to the public, by the appearance of a huge black gallows-tree towards the eastern end of the Grassmarket. This ill-omened apparition was of great height, with a scaffold surrounding it, and a double ladder placed against it, for the ascent of the unhappy criminal and the executioner. As this apparatus was always arranged before dawn, it seemed as if the gallows had grown out of the earth in the course of one night, like the production of some foul demon; and I well remember the fright with which the schoolboys, when I was one of their number, used to regard these ominous signs of deadly preparation. On the night after the execution the gallows again disappeared, and was conveyed in silence and darkness to the place where it was usually deposited, which was one of the vaults under the Parliament House, or courts of justice."