Although the cause of the disaster was never ascertained, a general impression prevailed that the Theatre had not been set on fire by accident, and the mysterious message left at the house of the unhappy manager seemed to confirm this suspicion. A report was also current that the Prince of Wales had some time previously received an anonymous letter telling him that all the principal public buildings should be burnt down one after the other. Innumerable fires, indeed, occurred, and many people were afraid of attending the Opera, since it was rumoured that a train of gunpowder had been found under it. Hence, doubtless, the "good-humoured" request of Mr Knox for a seat at the post of danger; and shortly afterwards another mention of him occurs. He had attended a Drawing-room held by the Queen, which had proved unusually crowded, owing to the sympathy that all were anxious to show for the Royal family on the acquittal of the Duke of York. GROSVENOR SQUARE, _March, 1809._ Knox was presented yesterday, and his Mamma takes him to introduce to all her acquaintances, which he does not like. Her last ball was much too full, she might have opened her whole house, therefore, there was no good dancing till just before supper, when the Musick was sent away, to the sore annoyance of Anne, who was just beginning the dance with Mr Fraser. The Knoxs say that Charlotte Bouverie is a painted thing, but Archy was charmed with her, and her dancing. He has given up talking of home, both he and Lord James dine here again, the 11th, with the Primroses and Mr Knox, Lady Milton, Lord Euston, and some others. The Drawingroom was very full yesterday, and I believe the Queen spoke to everybody; she thinks there are times to be civil. I was surprised at Court to hear Knox say he thought it was everybody's duty to go to Court yesterday, as he supposed Queens would feel like other Mothers. I was delighted to hear so loyal a speech from one of that house, for though his father and his uncle are in possession of a place of £10,000 a year, I do not believe they are disposed that way. Miss Shuckburgh [15] was presented yesterday, and as she has a borough, Knox thought she might be worth looking at, but the Borough and Twelve Thousand a year must be thought of, by any one disposed to think of her. The Beaumonts are to be at Cheltenham on Monday, the Colonel is much better, a _very_ large Blister has roused his senses. [16] _March 22nd._ You must put on a black coat for the Duchess of Bolton who died yesterday. [17] _March 30th, 1809._ Your brother Philip is by the kindness of the Duke of Montrose, the Master of the Horse, appointed Page to His Majesty. We are ordering him his smart uniform, sword, etc., for him to go to Court in, to kiss the King and Queen's hand, the week after next.