We shall leave until our chapter on the Pseudo-Aristotle “The book of the spiritual works of Aristotle, or the book _Antimaquis_, which is the book of the secrets of Hermes ... the ancient book of the seven planets.” But in at least one manuscript the work of Hermes on the images of the moon is accompanied by another briefer treatise ascribed to him on the images of the seven planets, one for each day of the week, to be made in the first hour of that day which is ruled by the planet after which the day is named. This little treatise begins with the words, “Said Hermes, editor of this book, I have examined many sciences of images.”[688] Altogether I have noted traces of it in four manuscripts. [Sidenote: _Book of Venus_ of Toz.] In two of these manuscripts the work of Hermes on images of the seven planets is immediately followed by a work of Toc or Toz Graecus on the occult virtues of stones called the Book of Venus or of the twelve stones of Venus.[689] The first part of the treatise, however, consists of instructions, largely astrological in character but also including use of names of spirits and suffumigations, for casting a metal image in the name of Venus. Astrological symbols are to be placed on the breast, right palm, and foot of the image. In the discussion of stones each paragraph opens with the words, “Said Toz.” The use of these stones is mainly medicinal, however, and consists usually in taking a certain weight of the stone in question. Of astrology, spirits, and power of words there is little more said. Some marvelous virtues are attributed to stones nevertheless. With one, if you secretly touch two persons who have hitherto been firm friends, you will make them enemies “even to the end of the world. And if anyone grates from it the weight of one _argenteus_ and mixes it with serpent’s blood (possibly the herb of that name) and gives it to anyone to drink, he will flee from place to place.” [Sidenote: Further mentions of Toz Graecus.]