THREAD:
Natan’el lived in Sana’a in the mid 12th century during a time which was very difficult for Jews in that region due to the rise of Shia Ismailism. He was the spiritual authority of the Jewish communities in Yemen and helped strengthen them.
You can find an English translation of the letter here: en.m.wikisource.org/wiki/Epistle_t…
Photos of the manuscript of “Gan HaSikhlim” (Garden of Intellects) are from the National Library of Israel.