Observationes astrologicæ, or, An astrological discourse of the effects of a notable conjunction of Saturn and Mars : and other configurations concomitant : from whence is rationally predicted the quality and time of the principal transactions that are probably to ensue in England, and several other parts of Europe : to which is prefixed, A brief institution, or Tutor to astrology, for the better understanding the following discourse ... and also added, a most ingenious discourse of the true systeme of the world /