Date: Erev Shabbos HaGadol 5574
From: Rabbi Moshe Sofer
To: Rabbi Liezer Dreznitz
The student proposes a resolution to the Vilna Gaon's question about what Rabbi Yochanan bar Bun's teaching adds regarding the columnar format of Haman's ten sons. The Chasam Sofer rejects this proposal and accepts the Gaon's own resolution.
Source: Shu"t Chasam Sofer OC §190