As follows:-(1) Letters of Anne Louise Bénédicte de Bourbon, Duchesse du Maine, to:-(a) her sister Maric Thérèse de Bourbon, Princesse de Conti (4); 1711. ff. 2-10;-(b) Marc René de Voyer d’Argenson, Lieutenant-General of Paris police; 1713. ff. 12-13;-(c) (?) Philippe II, Duc d’Orléans, Regent of France; 1720. ff. 15-16;-(d) Cardinal André Hercule de Fleury (2); 1726, 1739. ff. 18-21;-(e) François Arouet de Voltaire; 1750. Besterman, op cit., xviii, no. 3650. f. 23. Morrison Cat., iv, pp. 17-19, nos. 1-5, 7-10. ff. 2-23(2) Letter of Denis Diderot to François Arouet de Voltaire; 1766. Besterman, op. cit., lxiii, no. 12719; cf. Diderot’s Œuvres Complètes, 1875- 1877, xix, pp. 485-488; Morrison Cat., ii, pp. 37-38, no. 1. ff. 25-26(3) Letters of Claude Adrien Helvétius to:-(a) François Arouet de Voltaire; 1758. Besterman, op cit., xxxiv, no. 7195. ff. 28-29;-(b) his wife, Anne Catherine; n.d. ff. 31-32. Morrison Cat., ii, pp. 249-250, nos. 2, 3. ff. 28-32(4) Gabrielle Émilie Le Tonnelier de Breteuil, marquise Du Châtelet, to the Abbé Jean François du Resnel du Bellay; 1737. Besterman, op. cit., vi, no. 1265; cf. Morrison Cat., ii, p. 54, no. 1, and L’Amateur d’Autographes, iv, 1865, pp. 77-78, no. 1, where the addressee is wrongly identified as Alexander Pope. ff. 34-35(5) Marie Anne Françoise ( al Fanny) de Beauharnais, Comtesse des Roches- Baritaud, to:-(a) François Arouet de Voltaire; 1771. Imperfect. Besterman, op. cit., lxxix, no. 16216. f. 37;-(b) M. de Herain; 1788. ff. 39-40;-(c) citoyen Villars; 1801. ff. 42-43. Morrison Cat., i, p. 57, nos. 1-3. ff. 37-43. Paper; ff. 43. Folio. 1711-1801. Belonged to Alfred Morrison (Sotheby’s sale-cat., 10-14 Dec. 1917, lots 73, 295, 305, 486, 686), whose printed titlesheet precedes each letter with MS. notes of identity and provenance (mainly sales at Charavay’s, 1855-1881). Presented, through the Friends of the National Libraries, by Louis C.G. Clarke, Esq., LL.D., F.S.A.