Marie-Antoine was wedded to Friedrich Christian, Saxon Kurprinz, "20th June, 1747;" her age 23, his 25:--Chronology itself is something, if one will attend to it, in the absence of all else! The young pair were Cousins, their Mothers being Sisters; Polish Majesty one's Uncle, age now 51,--who was very fond of us, poor indolent soul, and glad of our company on an afternoon, "being always in his dressing-gown by 2 o'clock." Concerning which the tongue of Court scandal was not entirely idle,--Hanbury chronicling, as we once noticed. All which I believe to be mere lying wind. The young Princess was beautiful; extremely clever, graceful and lively, we can still see for ourselves: no wonder poor Polish Majesty, always in his dressing-gown by 2, was charmed to have her company,--the rather as I hope she permitted him a little smoking withal. Her husband was crook-backed; and, except those slight, always perfectly polite little passages, in Schmettau's Siege (1759), in the Hubertsburg Treaty affair, in the dinner at Moritzburg, I never heard much history of him. He became Elector 5th October, 1763; but enjoyed the dignity little more than two months. Our Princess had borne him seven children,--three boys, four girls,--the eldest about 13, a Boy, who succeeded; the youngest a girl, hardly 3. The Boy is he who sent Gellert the caparisoned Horse, and had estafettes on the road while Gellert lay dying. This Boy lived to be 77, and saw strange things in the world; had seen Napoleon and the French Revolution; was the first "King of Saxony" so called; saw Jena, retreat of Moscow; saw the "Battle of the Nations" (Leipzig, 15th-18th October, 1813), and his great Napoleon terminate in bankruptcy. He left no Son. A Brother, age 72, succeeded him as King for a few years; whom again a Brother would have succeeded, had not he (this third Brother, age now 66) renounced, in favor of HIS Son, the present King of Saxony. Enough, enough!-- August 28th, 1763, while afflicted Polish Majesty is making his packages at Warsaw, far away,--Marie-Antoinette, in Dresden, had sent Friedrich an Opera of her composing, just brought out by her on her Court-theatre there. Here is Friedrich's Answer,--to what kind of OPERA I know not, but to a Letter accompanying it which is extremely pretty. FRIEDRICH TO THE ELECTORAL PRINCESS (at Dresden). "POTSDAM, 5th September, 1763. "MADAM MY SISTER,--The remembrance your Royal Highness sends is the more flattering to me, as I regret infinitely not to have been spectator and hearer of the fine things [Opera THALESTRIS, words and music entirely lost to us] which I have admired for myself in the silent state.