NILI - Netzakh Israel Lo Yishaker ('The Eternity of Israel will not lie')

Letters by Aharon Aharonson to Haim Avraham, Avshalom Feinberg, Rafael Aboulafia, and others about various matters like condition of lands in Eretz Israel and whether worthwhile to purchase them, as well as monetary and health matters.
Memorandum from Eretz Israel activists in Egypt about giving monies to Aharon Aharonson for purpose of saving the Yishuv (pre-State community).