CAIRO, Egypt -- For the past 36 years journalist and author Desmond Zwar has shared a great secret: that it was not archaeologist Howard Carter who was responsible for the discovery of Tutankhamen's tomb, but a humble British corporal whose very presence on the site had to be kept confidential; who in the last days of the dig took a photograph that changed history. Richard Adamson was a 23-year-old spy. He had infiltrated the Wafdist Party -- dedicated to overthrowing British rule in Egypt -- and as a result 28 Egyptians were arrested in Cairo, four of them sentenced to...