Observationes astrologicae, or, An astrologicall discourse of the effects of that notable conjunction of Saturn and Mars and other configurations concomitant : from whence is rationally predicted the quality and time of those principall transactions that are probably to ensue in England and severall other parts of Europe (almost) until the year 1661 : to which is prefixed a brief institution for the better understanding of the following discourse ... : and also added a most ingenious discourse of the true systeme of the world /