The fifteen plates of the Mutus Liber "the Mute Book," are well known, and this book without words is recognized as a classic of the seventeenthcentury alchemical tradition. Although the engravings seem to outline an alchemical process in detail, their message is not immediately obvious and it really requires a commentary to make it intelligible to the presentday reader. Adam McLean's extensive commentary on this series of engravings reveals...