The signet-ring of Cæsar Borgia was exhibited a few years ago at a meeting of the British Archæological Association by the Rev. C. H. Hartshorne. It is of gold, slightly enamelled, with the date 1503, and round the inside is the motto, ‘Fays ceque doys avien que pourra.’ A box dropped into the front, having on it ‘Borgia,’ in letters reversed, round which are the words ‘Cor unum una via.’ At the back is a slide, within which, it is related, he carried the poison he was in the habit of dropping into the wine of his unsuspecting guests. Another ring-device of Cæsar Borgia was: ‘Aut Cæsar aut nihil.’ The following distich was made upon him:-- Borgia Cæsar erat factis et nomine Cæsar; ‘Aut nihil aut Cæsar’ dixit, utrumque fuit. In late times the death of Condorcet was occasioned by a subtle poison, made by Cabanis, and enclosed in a ring. The particulars of this tragedy are related by Arago. Proscribed by the Revolution of 1792, Condorcet, formerly secretary to the Academy of Sciences, took refuge in the house of a Madame Vernet, at Paris, a lady who generously risked her own life in endeavouring to save that of the eminent philosopher. Fearing to compromise his protectress by a longer stay, Condorcet left Paris with the intention of taking refuge in the country house of an old friend, who was, however, absent, and he wandered about, taking shelter at night in some stone-quarries, but was at length arrested, and conducted to Bourg-la-Reine, where he was placed in a damp cell. The next morning (March 28, 1794) he was found dead in his prison, having taken poison, which he carried about with him in a ring.