 Another important source of information about Egypt during the reign of Djedkare Isesi is the Abusir papyri . These are administrative documents , covering a period of 24 years during Djedkare 's reign ; they were discovered in the mortuary temples of pharaohs <unk> <unk> , <unk> and queen <unk> II . In addition to these texts , the earliest letters on papyrus preserved to the present day also date to Djedkare 's reign , dealing with administrative or private matters . 
