There is no great danger that Vienna will ever again be subjected to the inconveniencies of a siege. Yet, in case the thing should happen, a measure has been taken, which will prevent the necessity of destroying the suburbs: No houses without the walls are allowed to be built nearer to the glacis than six hundred yards; so that there is a circular field of six hundred paces broad all around the town, which, exclusive of the advantage above mentioned, has a very beautiful and salutary effect. Beyond the plain, the suburbs are built.—They form a very extensive and magnificent town of an irregularly circular form, containing within its bosom a spacious field, which has for its centre the original town of Vienna.

These magnificent suburbs, and the town together, are said to contain above three hundred thousand inhabitants; yet the former are not near so populous, in proportion to their size, as the town; because many houses of the suburbs have extensive gardens belonging to them, and many families, who live during the winter within the fortifications, pass the summer months in the suburbs.

Monsieur de Breteuil, the French ambassador, lives there at present. The Duke and I dined at his house a few days ago. This gentleman was attached to the Duc de Choiseul, and had been appointed ambassador to this court, in which character he was about to set out from Paris, when that minister was dismissed by the late King of France; upon which M. de Breteuil, instead of Vienna, was sent to Naples. But since the new King’s accession, he has been established at the court for which he was originally intended. He is a man of talents, and not calculated for a situation in which talents have little or no room for exertion.

About a week after our arrival at Vienna, we had the honour of being presented to the Emperor. The Count Degenfeldt accompanied us to the palace between nine and ten in the morning. After walking a few minutes in an adjoining room, we were conducted into that where the Emperor was alone. His manner is affable, easy, and gracefully plain.

The same forenoon we drove to Schonbrun, a palace about a league from Vienna, where the Empress resides at present. I had no small curiosity to see the celebrated Maria Theresa, whose fortunes have interested Europe for so many years. Her magnanimity in supporting the calamities to which the early part of her life was exposed, and the moderation with which she has borne prosperity, have secured to her universal approbation. She also was alone when we were presented. She conversed for some time with the D—— of H—— in an easy and cheerful manner, and behaved to all with an affable dignity. She now possesses but small remains of that beauty for which she was distinguished in her youth; but her countenance indicates benevolence and good-humour. I had often heard of the scrupulous etiquette of the Imperial court, but have found every thing directly opposite to that account.

Prince Kaunitz having seen a young English gentleman scarcely fourteen years of age, whom the D—— of H—— patronizes, and who has accompanied us on this tour, the Prince desired that he also might be presented to the Emperor and Empress, which was accordingly done, and they both received him in the most gracious manner. I mention this circumstance as a strong proof how far they are superior at this court to trifling punctilios, and how greatly they have relaxed in ceremony since the accession of the Lorrain family.

Two or three days after this, we were presented, at a full court, to the two unmarried Arch-Duchesses, their sister the Princess Albert of Saxony, and the Princess of Modena, who is married to the Emperor’s brother. The last couple are lately arrived from Milan on a visit to the Empress.

The Imperial family are uncommonly well-looking, and have a very strong resemblance to each other. They are all of a fair complexion, with large blue eyes, and some of them, particularly the Arch-duke, are distinguished by the thick lip so long remarked in the Austrian family. The beautiful Queen of France is the handsomest of this family, only because she is the youngest; some people think that her sister the Princess Albert has still the advantage.

One of the unmarried Arch-duchesses, who formerly was thought the most beautiful, has suffered considerably by the small-pox.—A lady of the court told me, that, as soon as this princess understood what her disease was, she called for a looking-glass, and with unaffected pleasantry took leave of those features she had often heard praised, and which she believed would be greatly changed before she should see them again. The diminution which the small-pox has made in the beauty of this Princess, has not in the smallest degree impaired her good-humour, or the essential part of her character, which by every account is perfectly amiable.