In 1948, he pretended to be an Arab fighter and observed Israel's War of Independence - from the Arab side. His observations were published in 1951 as "Cairo to Damascus." You can read most of the book online here, and it is fascinating. For example, he writes about dinner with London anti-semite, Nazi admirer and Arab supporter Robert Gordon-Canning:
Similar anecdotes about Arabs in 1948 abound. Here is one right after the Arabs captured Castel, but at the cost of losing their commander, Abdel Kader Husseini:
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