Ten of these papyri are very well preserved. The majority of these documents date to the 27th year of Khufu's reign and describe how the central administration sent food and supplies to the sailors and wharf workers. The dating of these important documents is secured by phrases typical for the Old Kingdom period, as well as the fact that the letters are addressed to the king himself, using his Horus name. This was typical when an addressed king was still alive; when the ruler was already dead he was addressed by his cartouche name or birth name. One document is of special interest: the diary of Merer, an official involved in the building of the Great Pyramid. Using the diary, researchers were able to reconstruct three months of his life, providing new insight into the everyday lives of people of the Fourth Dynasty. These papyri are the earliest examples of imprinted papyri ever found in Egypt. Another inscription, found on the limestone walls of the harbor, mentions the head of the royal scribes controlling the exchange of goods: "Idu".