PORTA, Giovanni Battista della. Magiae naturalis libri viginti, Frankfurt: Samuel Hempelius, 1607. 8°, printer's device on title, woodcut initials and headpieces (title soiled and upper corner torn away with loss of one letter of author's name, ca. 30pp. wormed with loss of one or 2 letters, upper inner corner of Dd1 torn without loss, slightly browned and spotted), later half caf (worn, covers detached, lacking backstrip, spine broken).