Sunday 19 September [1824]
[...] Mr. Herschell, the son of the famous Astronomer, who in 1781 discovered the planet which we call Herschell and which he named Georgius Sidus [the planet known today as Uranus], dined with us. He was born in England and speaks little German even though his father was German; he has an air of being very pleased with himself. They say he is very learned. Mr. Frauenhoffer, astronomer from Munich, has also dined with us, he is extremely learned, with lots of simplicity and bonhomie: he has made many discoveries and created the most perfect instruments one knows of at the moment in Europe [...]