Date: 8 Tishrei 5599
From: Rabbi Moshe Sofer
To: Rabbi Yaakov
The responsum addresses whether a broken lulav can be repaired and used, distinguishing between different types of connections, and also discusses the halachic status of fruits declared by a non-Jew to be from the second year (and thus possibly orlah).
Source: Shu"t Chasam Sofer Collected §36