In the Witch Room

[door_of_time]

"It was the floor which held Carson's gaze. The dull grey of the circular wall gave place here to a mosaic of varicoloured stone, in which blues and greens and purples predominated - indeed, there were none of the warmer colours. There must have been thousands of bits of coloured stone making up that pattern, for none was larger than a walnut. And the mosaic seemed to follow some definite pattern, unfamiliar to Carson; there were curves of purple and violet mingled with angled lines of green and blue, intertwining in fantastic arabesques. There were circles, triangles, a pentagram, and other, less familiar, figures. Most of the lines and figures radiated from a definite point: the centre of the chamber, where there was a circular disc of dead black stone perhaps two feet in diameter."
- Henry Kuttner, The Salem Horror