I have sometimes found myself wondering if vampires have problems with the hems of their cloaks fraying, as they glide along with the fancy, satin, floor-length item trailing behind. It seems to me that some type of ball-bearing system, offering both weight, to assist in the dramatic drape of the cloak, and protection, from the ground upon which they are dragged, may be a good idea (ignoring the noise that would make the whole appearing from nowhere more difficult). So it was not surprising that last night this thought crystallized into a Far Side like vision of some salesmen, knocking on the door of a vampire’s castle, with the caption, ‘Rex Simpson, door-to-door salesman of the Heminator-5000.’ And though this story has nothing to do with that vision, it did lead my mind to wander in this direction, rather than letting me go to sleep.