William Lilly 
Horary Astrology 

Horary Astrology, the chief subject in this work. may be speedily learned by any person of even moderate abilities; and may, as far as regards its elementary difficulties, be mastered in a few days’ study. It may be well understood, and reduced to constant practice in less than a quarter of a year, and no one will find himself at a loss for occasions to test its reality or its utility; for his own avocations, and the affairs of his friends, will offer these almost daily. If a proposition of any nature be made to any individual, about the result of which he is anxious, and therefore uncertain whether to accede to it or not, let him but note the hour and minute when it was first made, and erect a figure of the heavens, as herein taught, and his doubts will be instantly resolved.