[236] Claude Adrien Helvetius, born 1715, died 1771. Published “De l’Esprit” in 1758. [237] John Claude Helvetius, his father, celebrated physician and author; died 1755. [238] His “History of the Rebellion.” [Page heading: SOCIAL FESTIVITIES] In the next letter of January 4 she says-- “I was last night at Lady Cowper’s concert, where there was much good company and good musick. The night before I was at an assembly at Mrs. Pitt’s, where I found Sir John Mordaunt playing at cards with Lady Hester Pitt; this might be accident, but among political folks one is apt to look deeper perhaps than the truth lies, but this and General Conway being received into grace and sent to Le Cas[239] to settle the cartel for exchange of prisoners, makes me suspect some coalition may be designed between the folks at Leicester House and the D(uke).... I am to go to the play with Miss Pitt to-morrow night. Mr. Garrick is to act Anthony, he will make but a diminutive hero; I should not think it a part he would shine in, but he has taken great pains about it.” [239] He was sent to Sluys, for which the French is L’Ecluse, not Le Cas, to meet Monsieur de Bareil. On January 18, writing to her husband, Mrs. Montagu says-- “It is apprehended the loss of the King of Spain[240] will be a misfortune to Great Brittain. There is a great conspiracy discovered in Portugal; it was at first surmised that the assassination[241] of the King arose from jealousy, but people now think there was more of ambition than jealousy in it. The Marquis of Tavora’s family had a nearer claim to the crown than that Duke of Braganza who got it, but not being personally so well qualified for so great an attempt, or for want of alliances or other means, they were quietly governed by Spain, but when the Braganzas gained the Royal dignity, they grudged it to them, and ambition and envy may easily form conspiracy and assassination. Twelve of the first nobility will be brought to the scaffold.” [240] Ferdinand VI. [241] Attempted assassination of Joseph I., led to the expulsion of the Jesuits. [Page heading: ROUSSEAU] On the 24th occurs a very long letter to Mrs. Carter. In this mention is made of Rousseau: “There is a letter from Rousseau to Mr. D’Alembert[242] upon the project of settling a theatre at Geneva, which treats of Dramatical performances in general; it is ingeniously written and with great eloquence.” She also adds that she is sending Mrs. Carter Dr. Newton’s “Dissertation on the Prophecies,” Leland’s “Life of Philip of Macedon.”