A manuscript was communicated to me during my travels in Italy, which was copied from the archives of the Cenci Palace at Rome, and contains a detailed account of the horrors which ended in the extinction of one of the noblest and richest families of that city during the Pontificate of Clement VIII, in the year 1599. The story is, that an old man having spent his life in debauchery and wickedness, conceived at length an implacable hatred towards his children; which showed itself towards one daughter under the form of an incestuous passion, aggravated by every circumstance of cruelty and violence. This daughter, after long and vain attempts to escape from what she considered a perpetual contamination both of body and mind, at length plotted with her mother-in-law and brother to murder their common tyrant. The young maiden, who was urged to this tremendous deed by an impulse which overpowered its horror, was evidently a most gentle and amiable being, a creature formed to adorn and be admired, and thus violently thwarted from her nature by the necessity of circumstance and opinion. The deed was quickly discovered, and, in spite of the most earnest prayers made to the Pope by the highest persons in Rome, the criminals were put to death. The old man had during his life repeatedly bought his pardon from the Pope for capital crimes of the most enormous and unspeakable kind, at the price of a hundred thousand crowns; the death therefore of his victims can scarcely be accounted for by the love of justice. The Pope, among other motives for severity, probably felt that whoever killed the Count Cenci deprived his treasury of a certain and copious source of revenue. (The Papal Government formerly took the most extraordinary precautions against the publicity of facts which offer so tragical a demonstration of its own wickedness and weakness; so that the communication of the manuscript had become, until very lately, a matter of some difficulty.) Such a story, if told so as to present to the reader all the feelings of those who once acted it, their hopes and fears, their confidences and misgivings, their various interests, passions, and opinions, acting upon and with each other, yet all conspiring to one tremendous end, would be as a light to make apparent some of the most dark and secret caverns of the human heart.