The Magus, or Celestial Intelligencer

In the upper right corner of the page is a hand-drawn square astrological chart (horoscope). This type of diagram was standard in the 16th and 17th centuries, featuring a central square with a diamond shape inside it, which is further divided into twelve triangular segments representing the astrological houses. There are very faint, nearly illegible characters and symbols written within several of the house triangles, likely representing planetary positions or zodiac signs.