The Carter-facet had soon learned with horror that the silver key was unable to effect his return to human form. It was, as he deduced too late from things he remembered, things he dreamed, and things he inferred from the lore of Yaddith, a product of Hyperborea on Earth; with power over the personal consciousness-angles of human beings alone. It could, however, change the planetary angle and send the user at will through time in an unchanged body. There had been an added spell which gave it limitless powers it otherwise lacked; but this, too, was a human discovery—peculiar to a spatially unreachable region, and not to be duplicated by the wizards of Yaddith. It had been written on the undecipherable parchment in the hideously carven box with the silver key, and Carter bitterly lamented that he had left it behind. The now inaccessible Being of the abyss had warned him to be sure of his symbols, and had doubtless thought he lacked nothing.