The source of the following information is an article from the News Toronto Bureau by Barry Brown, dated February 27, 1988, by way of Farrell Till on the Yahoo group errancyn, "The Size of the Hebrew Camps," 5-20-00:
On February 26, 1988, the Israeli archaeologist Eliezer Oren spoke at the Royal Ontario Museum about his excavations at 80 different sites in the Sinai peninsula from 1972 through 1982. He reported that he had found no evidence for a 40-year nomadic residence in this region by two to three million people. He reported finding at the ruins of an Egyptian outpost a record of two runaway slaves who had been spotted, but in all of his diggings, he found nothing about the sightings of a vast horde of people going through the desert. "They [the two slaves] were spotted and the biblical account of 2.5 million people with 600 thousand of military age weren't?" Oren questioned. "This can't be explained unless you invoke miracles here, and I am a member of the department of archaeology and not of miracles."
Oren reported that other archaeological expeditions beside his have been working in the Sinai region for just as long as he has, but they had found no traces of human activity at all from the time of the exodus except for small mining operations that were under the control of the Egyptians. He reported that archaeologists have found none of the cities that the Israelites allegedly conquered on their way out of the region except for the town of Kadesh, but he said, "To our great surprise, there is nothing there earlier than the 10th century." The exodus, however, allegedly happened in the 15th century B. C. The Bible reports that the 2.5 to 3 million Israelites camped at over 40 different sites, taking with them large herds of livestock, but Oren reported that no evidence of such encampments have been found.