<p style='text-align: justify;'>Letter to ‘my son’ Isaac ha-Kohen b. Jacob the judge from ‘his father’ Nathan ha-Kohen b. Joseph (obviously not father and son in the strict biological sense, as he also sends greetings to Jacob the judge, the actual father), concerned with business matters, for example the trade of indigo. Mentions people including Abū l-Riḍā, Abū l-Ḥasan, Judah, Aaron and ‘my son’ (Abū l-)Wafā. </p>