It is not academic , but there are some inscriptions along the exodus path that seems to be from the original people of the exodus
taken from this link
http://www.bibleprobe.com/exodus.htm
excerpt below
During the last century many explorers rediscovered a group of ancient inscriptions in the Wadi Mukatteb ("The Valley of Writing") on the Sinai Peninsula. It is commonly agreed that these inscriptions were made by the escaped Hebrew slaves of Egypt as they passed through the area under the leadership of Moses. While these inscriptions received much attention at first, the concept that these inscriptions were made by the Hebrews of the Exodus was summarily rejected by most scholars merely because they are most commonly known from the Bible. Their evidence was...well, no evidence at all, as they generally refused to even examine the inscriptions, the written record or the testimony of any of these explorers. They had made reference to an event related in the Bible and that was enough to refute that the inscriptions held anything of substance.
Nonetheless, the few scholars who examined the inscriptions affirmed that these inscriptions were indeed written by the Hebrews who actually witnessed the miraculous events described:
Cosmas Indicopleustes, Byzantine Christian author, wrote that the inscriptions appeared "at all halting places, all the stone in that region which were broken off from the mountains, written with carved Hebrew characters" usually proclaiming, "The departure of such and such a man of such a tribe, in such a year, in such a month." (from Arthur Penrlyn Stanley, Sinai and Palestine [London: John Murray, 1905], p. 57)
Examiners concluded that, as the inscriptions had survived in such good shape for as long as the locals could recall in the dry, hot climate they could easily have survived since the time that the Exodus in thought to have occurred.
Bishop Robert Clayton of Ireland also confirmed that the inscriptions were definitely of ancient Hebrew origin, consisting mostly of name, tribe and date or similar inscriptions by persons obviously passing through or, perhaps, camping nearby for a short period of time. He published these findings in the Journal of Franciscans of Cairo (1753)
A more detailed examination by Rev. Charles Forster, described in his book Sinai Photographed [London: Richard Bentley, 1852] asserted that the Hebrew characters throughout the inscriptions in the area had been obviously influenced in form by Egyptian hieroglyphics.
Historian Diodorus Siculus, about 10 B.C. described the Sinai Peninsula in his Library of History wrote, "Moreover, an altar is there built of hard stone and very old in years, bearing an inscription in ancient letters of an unknown tongue. the oversight of the sacred precinct is in the care of a man and woman who hold the position for life." (Bk. 3, sect. 42, Loeb Classical Library, C.H. Oldfather, trans. [Cambridge Harvard University Press, 1993], p.211)
