William Lilly (1602-1681), was a famed English astrologer and occultist during his time. He began to dabble in astrology, reading all the books on the subject he could fall in with, and occasionally trying his hand at unravelling mysteries by means of his art. The years 1642 and 1643 were devoted to a careful revision of all his previous reading, and in particular, having lighted on Valentine Naibod's Commentary on Alcabitius, he "seriously studied him and found him to be the profoundest author he ever met with.
His most comprehensive book was published in 1647 and was entitled Christian Astrology. It is so large that it came in three separate volumes in modern times, and it remains popular even today and has never gone totally out-of-print. Lilly caused much controversy in 1666 for allegedly predicting the Great Fire of London some 14 years before it happened. For this reason many people believed that he might have started the fire, but there is no evidence to support these claims. He was tried for the offence in Parliament but was found to be innocent.