This fact imposes further severe limitations upon all inquiry into the subject. The Delta is an alluvial fan of mud deposited through many millenia by the annual flooding of the Nile; it has no source of stone within it. Mud, mud and wattle, and mud-brick structures were of limited duration and use, and were repeatedly leveled and replaced, and very largely merged once more with the mud of the fields. So those who squawk intermittently, “No trace of the Hebrews has ever been found” (so, of course, no exodus!), are wasting their breath. The mud hovels of brickfield slaves and humble cultivators have long since gone back to their mud origins, never to be seen again. Even stone structures (such as temples) hardly survive, in striking contrast to sites in the cliff-enclosed valley of Upper Egypt to the south. All stone was anciently shipped in from the south, and repeatedly recycled from one period to another. Thus Eighteenth Dynasty blocks were reused in Ramesside temples; Ramesside temples were replaced under later dynasties largely by reuse of existing stones again; and periods through Saite, Ptolemaic, Romano-Byzantine, and Islamic times repeated the process. In more recent centuries, limestone has been largely burned for lime, and harder stones often reused for millstones or whatever.
Scarce wonder that practically no written records of any extent have been retrieved from Delta sites reduced to brick mounds (whose very bricks are despoiled for fertilizer, sebakh), with even great temples reduced to heaps of tumbled stones. And in the mud, 99 percent of discarded papyri have perished forever; a tiny fraction (of late date) have been found carbonized (burned) — like some at Pompeii — but can only be opened or read with immense difficulty. A tiny fraction of reports from the East Delta occur in papyri recovered from the desert near Memphis. Otherwise, the entirety of Egypt’s administrative records at all periods in the Delta is lost (fig. 32B); and monumental texts are also nearly nil. And, as pharaohs never monumentalize defeats on temple walls, no record of the successful exit of a large bunch of foreign slaves (with loss of a full chariot squadron) would ever have been memorialized by any king, in temples in the Delta or anywhere else. On these matters, once and for all, biblicists must shed their naive attitudes and cease demanding “evidence” that cannot exist. Only radically different approaches can yield anything whatsoever. “Archaeology” that limits its blinkered evidence solely to what comes out of modest holes dug in the ground can have no final say in the matter.
K.A. Kitchen, On the Reliability of the Old Testament, p. 245-246