Here is the Chasam Sofer’s letter:
(The hebrew is not in a copyable/pasteable formant so this is the translation, printed in Hakirah, and available on their website)
Shevat [5]597 (=1837).
Peace, goodness, long days and years of life to my friend, my student, the Rav etc., R. Eleazar S.G.L. Horowitz, may his light shine, Head of Beit Din in the capital city Vienna.
Your valuable [letter] [So] patience under pressure [produces strife]
Moshe ha-Katan Sofer of Frankfort-on-the-Main