Isaak assigns responsibility to the monks, saints, and apostles to safeguard the precious book he is donating to the fraternity, and forbids it to be offered, sold, exchanged, or secretly appropriated. It is customary in Byzantium that at the end of a book, the donor draws attention to the necessity of preserving it, sometimes even with threats or curses. However, despite the precautions taken by Isaak, the manuscript was removed at an unknown time and under obscure circumstances from the library of the Monastery. Surprisingly, it was later found in Konstantinople, and the Lord Iakovos Malaspina bought it in 1492 and sent it back to the Monastery, where it is still kept today. It is an example of the relationship the Monastery maintained with wealthy aristocrats, even after the end of Byzantium.
