LETTER XLII. Dancing improved in France--Effect of some of the ballets--_Noverre_ and _Gardel_ first introduce them on the French stage--Rapid change of scenery--Merits of the dancers of both sexes--The rector of St. Roch refuses to admit into that church the corpse of Mademoiselle _Chameroi_--The dancers in private society now emulate those who make dancing their profession--Receipts of the opera. LETTER XLIII. New year's day still celebrated in Paris on the 1st of January --Customs which prevail there on that occasion--_Denon's_ account of the French expedition to Egypt--That country was the cradle of the arts and sciences--_Fourrier_ confirms the theory of _Dupuis_, respecting the origin, &c. of the figures of the Zodiac. LETTER XLIV. _Hôtel des Invalides_--It was projected by Henry IV and erected by Lewis XIV--Temple of Mars--To its arches are suspended the standards and colours taken from the enemy--Two British flags only are among the number--Monument of _Turenne_--Circumstances of his death--Dome of the _Invalides_--Its refectories and kitchens--Anecdote of Peter the Great--Reflections on establishments of this description--_Champ de Mars_--_École Militaire_--Various scenes of which the _Champ de Mars_ has been the theatre--Death of _Bailly_--Modern national fêtes in France, a humble imitation of the Olympic games. LETTER XLV. Object of the different learned and scientific institutions, which, before the revolution, held their sittings in the _Louvre_--Anecdote of Cardinal Richelieu--National Institute of Arts and Sciences --Organization of that learned body--Description of the apartments of the Institute--Account of its public quarterly meeting of the 15th Nivose, year X, (5th of January, 1802)--Marriage of Mademoiselle _Beauharnois_ to _Louis Bonaparte_. LETTER XLVI. _Opéra Buffa_--The Italian comedians who came to Paris in 1788, had a rapid influence on the musical taste of the French public--Performers of the new Italian company--Productions of _Cimarosa_, _Paësiello_, &c.--Madame _Bolla_. LETTER XLVII. Present state of public worship--Summary of the proceedings of the constitutional clergy--National councils of the Gallican church held at Paris--Conduct of the Pope, _Pius VII_--The Cardinal Legate, _Caprara_, arrives in Paris--The Concordat is signed--Subsequent transactions. LETTER XLVIII. _Pantheon_--Description of this edifice--_Marat_ and _Mirabeau_ pantheonized and dispantheonized--The remains of _Voltaire_ and _Rousseau_ removed hither--The Pantheon in danger of falling--This apprehension no longer exists--_Bonaparte_ leaves Paris for Lyons. LETTER XLIX. Scientific societies of Paris--_Société Philotechnique_--_Société Libre des Sciences, Lettres, et Arts_--_Athénée des Arts_--_Société Philomatique_--_Société Académique des Sciences_--_Société Galvanique_--_Société des Belles-Lettres_--_Académie de Législation_ --_Observateurs de l'Homme_--_Athénée de Paris_.