From Ebenezer Sibly's New and Complete Illustration of the Celestial Science of Astrology;
Horoscope: Plate number 11, between pages 856 and 857. Natal report: p.858
Sibly's source: undeclared

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CHARLES I. KING of ENGLAND. Born in Lat. 56°. This unfortunate monarch was crowned king of this empire in the twenty-fifth year of his age ; and was soon after married to the daughter of Henry IV of France. The medium-coeli was then directed to the triangular rays of the Moon, in the house of dignity. In the twenty-ninth year of his geniture he had the medium-coeli directed to the opposition of the Sun, under which influence he dissolved his parliament. The Scotch enthusiastic phrenzy took place in his thirty-eighth year, under the direction of Saturn to a conjunction of the Moon. In 1641, being in the forty-first year of his age, he summoned a new parliament, in which the famous contention about the militia took place. It likewise fermented religious jealousies, and laid the foundation of serious machinations against the king's life; all which misfortunes are prefigured by, and happened under the influence of, the ascendant directed to the quartile of Venus, lady of the tenth house; and of the medium-coeli directed to the quartile rays of Jupiter. It was in the forty-sixth year of his geniture, that this monarch placed his life in the hands of the Scotch army, expecting from them that safety and protection they had proffered to give. But, when they had effected their bargain with the parliament, they barely surrendered him up, in violation of all the ties of honour, humanity, and benevolence. This transaction took place under the malevolent influence of Saturn transiting the midheaven, a configuration in the world known to be the forerunner of ingratitude, treachery, and deceit. In his forty-eighth year, this unhappy monarch was beheaded, in the front of his own palace, Whitehall. This memorable event was effected under the direction of the Part of Fortune to the quartile of the Moon, and the zodiacal parallel of Saturn to the mundane parallel of Mars; and might serve as a useful monitor to succeeding princes, not to trifle with the remonstrances of a free people; nor to hold in defiance that genuine flame of heaven-born patriotism, which, when once seriously kindled through an empire, carries all before it, and breaks down every barrier of protection, even to the sacred person of the Lord's anointed.