Date: Erev Shabbos Erev Rosh Chodesh Teves 5560
From: Rabbi Moshe Sofer
To: Unknown recipient
The teshuvah addresses whether Chanukah candles should be lit left-to-right or right-to-left. The Chasam Sofer rules with the Rishonim that one lights from left to right, establishing four principles distinguishing circling by foot from turning by hand.
Source: Shu"t Chasam Sofer OC §187