Through Lands of the Bible by H.V. Morton (1938)
In the 1930s, H.V. Morton decided to make a Christian pilgrimage from the Euphrates to the Nile, and into Sinai, and to tell the story of the Christian life of the Near East. His account describes the journey from Babylon to Baghdad, from Coptic monasteries to the churches of Rome. Chapter 6 is dedicated to Siwa.