Edition: First printing
London: Faber, 1964. Octavo. Maroon cloth. Rubbing at head of spine, covers a little bowed, else fine and bright, no owner names. Jacket has light sunning to the tan lettered portions of the spine, else fine and bright, no chips, clips or tears. A nice copy of this scarce historical novel of 13th century English monk and scientist Roger Bacon, widely accused of being a sorcerer, the first volume of the After Such Knowledge sequence, although the second published. The first published US edition, 1971, had textual changes.